Server was unable to complete your request - Out of no where

Nextcloud version (eg, 20.0.5): 21.0.3
Operating system and version (eg, Ubuntu 20.04): ubuntu 20.04
Apache or nginx version (eg, Apache 2.4.25): apache2 2.4.41
PHP version (eg, 7.4): 7.4 (I think)

The issue you are facing:
When I go to my next cloud I don’t see any apps ecsept files, and when I click on a file I get interceded with the words

Internal Server Error

The server was unable to complete your request.
If this happens again, please send the technical details below to the server administrator.
More details can be found in the server log.

I have only seen this now.

Steps to replicate it:

I don’t really think I did anything

The output of your Nextcloud log in Admin > Logging:

{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"***","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":2,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"lib","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"AppManger::checkAppForUser - can't decode group IDs: Nextcloud or one of the apps require upgrade - only a limited number of commands are available\nYou may use your browser or the occ upgrade command to do the upgrade\nyes - json error code: 4","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":0,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"scss_cacher","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"SCSSCacher::process ordinary check follows","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":0,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"scss_cacher","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"SCSSCacher::isCached 555d-d9ed-server.css isCachedCache is expired or unset","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":0,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"scss_cacher","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"SCSSCacher::isCached 555d-d9ed-server.css dependencies successfully cached for 5 minutes","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":0,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"scss_cacher","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"SCSSCacher::process ordinary check follows","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":0,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"scss_cacher","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"SCSSCacher::isCached 555d-d9ed-css-variables.css isCachedCache is expired or unset","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}
{"reqId":"uFAM2RklsdSOpVnV8qAK","level":0,"time":"2021-07-04T02:41:07+00:00","remoteAddr":"192.168.1.111","user":"jon","app":"scss_cacher","method":"GET","url":"/remote.php/webdav/index.php/csrftoken","message":"SCSSCacher::isCached 555d-d9ed-css-variables.css dependencies successfully cached for 5 minutes","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36","version":"21.0.3.1"}

config.php
<?php
$CONFIG = array (
  'passwordsalt' => '***',
  'secret' => '***',
  'trusted_domains' => 
  array (
    0 => '***',
    1 => '***',
    2 => '***',
    3 => '***',
  ),
  'datadirectory' => '/mnt/ncdata',
  'dbtype' => 'pgsql',
  'version' => '21.0.3.1',
  'overwrite.cli.url' => '***',
  'dbname' => 'nextcloud_db',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'ncadmin',
  'dbpassword' => '***',
  'installed' => true,
  'instanceid' => '***',
  'upgrade.disable-web' => false,
  'log_type' => 'file',
  'logfile' => '/var/log/nextcloud/nextcloud.log',
  'loglevel' => 0,
  'log.condition' => 
  array (
    'apps' => 
    array (
      0 => 'admin_audit',
    ),
  ),
  'mail_smtpmode' => 'smtp',
  'remember_login_cookie_lifetime' => '1800',
  'log_rotate_size' => '10485760',
  'trashbin_retention_obligation' => 'auto, 180',
  'versions_retention_obligation' => 'auto, 365',
  'simpleSignUpLink.shown' => false,
  'filelocking.enabled' => true,
  'memcache.distributed' => '\\OC\\Memcache\\Redis',
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' => 
  array (
    'host' => '/var/run/redis/redis-server.sock',
    'port' => 0,
    'timeout' => 0.5,
    'dbindex' => 0,
    'password' => '***',
  ),
  'default_phone_region' => 'us',
  'logtimezone' => 'Etc/UTC',
  'htaccess.RewriteBase' => '/',
  'enable_previews' => true,
  'enabledPreviewProviders' => 
  array (
    0 => 'OC\\Preview\\PNG',
    1 => 'OC\\Preview\\JPEG',
    2 => 'OC\\Preview\\GIF',
    3 => 'OC\\Preview\\BMP',
    4 => 'OC\\Preview\\MarkDown',
    5 => 'OC\\Preview\\MP3',
    6 => 'OC\\Preview\\TXT',
    7 => 'OC\\Preview\\Movie',
    8 => 'OC\\Preview\\Photoshop',
    9 => 'OC\\Preview\\SVG',
    10 => 'OC\\Preview\\TIFF',
  ),
  'preview_max_x' => '2048',
  'preview_max_y' => '2048',
  'jpeg_quality' => '60',
  'ldapProviderFactory' => 'OCA\\User_LDAP\\LDAPProviderFactory',
  'maintenance' => false,
  'mail_smtpsecure' => 'tls',
  'mail_sendmailmode' => 'smtp',
  'mail_smtphost' => '***',
  'mail_smtpport' => '587',
  'mail_from_address' => 'nextcloud',
  'mail_domain' => '***',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpauth' => 1,
  'mail_smtpname' => '***',
  'mail_smtppassword' => '***'
  'theme' => '',
  'memcache.local' => '\\OC\\Memcache\\Redis',
);


The output of your Apache/nginx/system log in /var/log/____:


[Sun Jul 04 00:00:14.817190 2021] [mpm_event:notice] [pid 4036:tid 139993235807296] AH00489: Apache/2.4.41 (Ubuntu) OpenSSL/1.1.1f configured -- resuming normal operations

If anyone can help that would be great! :grinning: :grinning: :grinning: