Unable to Login After Installation and Restart

A few nights ago, I decided to try out nextcloud:latest. I installed it via Portainer-CE, using a Docker Compose file. The compose file looks like this:

version: '3.2'
services:
    nextcloud:
        image: nextcloud:latest
        container_name: nextcloud
        restart: always
        volumes:
            - /srv/nextcloud:/var/www/html
        ports:
            - "8080:80"
        environment:
            NEXTCLOUD_TRUSTED_DOMAINS: 10.12.8.3 artixserv.txp-network.ml cloud.txp-network.ml
            MYSQL_HOST: '10.12.8.2'
            MYSQL_DATABASE: nextcloud
            MYSQL_USER: mysql_user_placeholder
            REDIS_HOST: redis
    redis:
        image: redis:alpine
        container_name: redis
        restart: always

After the installation was complete, I ended up with an Admin account and a fresh install of Nextcloud Hub. I didn’t attempt any other configuration changes afterward, because of the fact that it was pretty late and I don’t trust my brain after midnight. I took a look at the available apps, and then stopped the container for the night. When I attempted to resume the nextcloud:latest container last night, I kept running into this:

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.

Technical details

  • Remote Address: 10.12.7.4
  • Request ID: EFAktDeYDSHbnWoHPYM2

Every time I attempted login, I got variations of that, where the Request ID was the only thing that changed. I checked connection to MariaDB, no issues there. When I looked at the logs, through Portainer-CE, I saw this:

10.12.7.4 - - [27/Sep/2021:03:42:00 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 918 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /ocs/v2.php/search/providers?from=%2Fapps%2Fdashboard%2F HTTP/1.1" 200 1106 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /ocs/v2.php/apps/weather_status/api/v1/location HTTP/1.1" 200 908 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "PROPFIND /remote.php/dav/ HTTP/1.1" 207 1025 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 918 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /cron.php HTTP/1.1" 200 932 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /core/preview?fileId=33&x=32&y=32 HTTP/1.1" 404 789 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /core/preview?fileId=178&x=32&y=32 HTTP/1.1" 404 790 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "PROPFIND /remote.php/dav/principals/users/admin/ HTTP/1.1" 207 1691 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /ocs/v2.php/apps/weather_status/api/v1/favorites HTTP/1.1" 200 886 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /core/preview?fileId=31&x=32&y=32 HTTP/1.1" 404 790 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "PROPFIND /remote.php/dav/calendars/admin/ HTTP/1.1" 207 2035 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:01 +0000] "GET /ocs/v2.php/apps/spreed/api/v4/room HTTP/1.1" 200 1436 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:07 +0000] "GET /settings/apps/organization/tasks HTTP/1.1" 200 11120 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /apps/settings/js/apps.js?v=74a04737-0 HTTP/1.1" 200 1807 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /apps/settings/js/vue-settings-apps-users-management.js?v=74a04737-0 HTTP/1.1" 200 91649 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /apps/settings/js/vue-settings-apps.js?v=b7fdf039d56065808fae HTTP/1.1" 200 11703 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /apps/settings/js/vue-vendors-settings-apps.js?v=f5ad5faaac8822820b2d HTTP/1.1" 200 69186 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /apps/settings/js/vue-vendors-settings-apps-settings-users.js?v=f92b1c66a6b979a37984 HTTP/1.1" 200 182365 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 200 1491 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 918 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /cron.php HTTP/1.1" 200 932 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:08 +0000] "GET /ocs/v2.php/search/providers?from=%2Fsettings%2Fapps%2Forganization%2Ftasks HTTP/1.1" 200 1106 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:09 +0000] "GET /ocs/v2.php/cloud/groups?offset=0&search=&limit=5 HTTP/1.1" 200 901 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:09 +0000] "GET /settings/apps/list HTTP/1.1" 200 690398 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:09 +0000] "GET /settings/apps/categories HTTP/1.1" 200 1075 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:10 +0000] "GET /core/img/rating/s9.svg HTTP/1.1" 200 1341 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:10 +0000] "GET /core/img/rating/s7.svg HTTP/1.1" 200 1364 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:10 +0000] "GET /core/img/rating/s10.svg HTTP/1.1" 200 1158 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:10 +0000] "GET /core/img/rating/s8.svg HTTP/1.1" 200 1481 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:42:10 +0000] "GET /settings/apps/organization/tasks HTTP/1.1" 200 11119 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
127.0.0.1 - - [27/Sep/2021:03:42:18 +0000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.48 (Debian) PHP/8.0.10 (internal dummy connection)",
10.12.7.4 - - [27/Sep/2021:03:42:38 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:43:09 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:43:34 +0000] "GET /core/img/rating/s6.svg HTTP/1.1" 200 1179 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:43:38 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 799 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:43:57 +0000] "GET /settings/apps/integration/riotchat HTTP/1.1" 200 11125 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:44:08 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:44:24 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 919 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:44:29 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 919 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:44:30 +0000] "GET /settings/apps/integration/onlyoffice HTTP/1.1" 200 11118 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:44:38 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:44:40 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 918 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:44:46 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 918 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:45:00 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 919 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:45:09 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:45:39 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:46:09 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:46:39 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:47:09 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:47:09 +0000] "PUT /apps/user_status/heartbeat HTTP/1.1" 200 919 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:47:39 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:48:09 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:48:39 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:49:09 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:49:39 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:50:09 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [27/Sep/2021:03:50:39 +0000] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 800 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
[Mon Sep 27 03:50:49.429364 2021] [mpm_prefork:notice] [pid 1] AH00170: caught SIGWINCH, shutting down gracefully,
Configuring Redis as session handler,
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.20.0.3. Set the 'ServerName' directive globally to suppress this message,
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.20.0.3. Set the 'ServerName' directive globally to suppress this message,
[Thu Sep 30 05:32:29.554530 2021] [mpm_prefork:notice] [pid 1] AH00163: Apache/2.4.48 (Debian) PHP/8.0.10 configured -- resuming normal operations,
[Thu Sep 30 05:32:29.555359 2021] [core:notice] [pid 1] AH00094: Command line: 'apache2 -D FOREGROUND',
10.12.7.4 - - [30/Sep/2021:05:47:40 +0000] "GET / HTTP/1.1" 302 1052 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
172.20.0.1 - - [30/Sep/2021:05:47:56 +0000] "GET /custom_apps/richdocumentscode/proxy.php?req=/hosting/capabilities HTTP/1.1" 200 587 "-" "Nextcloud Server Crawler",
10.12.7.4 - - [30/Sep/2021:05:47:54 +0000] "GET /login HTTP/1.1" 200 8458 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /core/css/guest.css?v=74a04737-0 HTTP/1.1" 200 6183 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /core/js/dist/files_fileinfo.js?v=74a04737-0 HTTP/1.1" 200 10057 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /core/js/dist/files_client.js?v=74a04737-0 HTTP/1.1" 200 43605 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /core/js/backgroundjobs.js?v=74a04737-0 HTTP/1.1" 200 1204 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/files_sharing/js/dist/main.js?v=74a04737-0 HTTP/1.1" 200 1670 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/accessibility/js/accessibilityoca.js?v=74a04737-0 HTTP/1.1" 200 5241 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/files_videoplayer/js/main.js?v=74a04737-0 HTTP/1.1" 200 3543 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/files_rightclick/js/script.js?v=74a04737-0 HTTP/1.1" 200 3817 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/files_rightclick/js/files.js?v=74a04737-0 HTTP/1.1" 200 1868 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/theming/js/theming.js?v=74a04737-0 HTTP/1.1" 200 602 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /core/js/dist/main.js?v=74a04737-0 HTTP/1.1" 200 480548 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/theming/styles?v=0 HTTP/1.1" 304 883 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /core/js/dist/login.js?v=74a04737-0 HTTP/1.1" 200 265079 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /js/core/merged-template-prepend.js?v=74a04737-0 HTTP/1.1" 200 3935 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:58 +0000] "GET /core/img/actions/confirm-white.svg?v=2 HTTP/1.1" 200 940 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:58 +0000] "GET /core/img/loading-dark.gif HTTP/1.1" 200 5216 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:58 +0000] "GET /core/img/actions/toggle.svg HTTP/1.1" 200 843 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:57 +0000] "GET /apps/accessibility/css/user-a82fd95db10ff25dfad39f07372ebe37 HTTP/1.1" 200 4808 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:58 +0000] "GET /svg/core/logo/logo?color=ffffff&v=1 HTTP/1.1" 200 1150 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:47:58 +0000] "GET /cron.php HTTP/1.1" 200 1607 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
127.0.0.1 - - [30/Sep/2021:05:48:05 +0000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.48 (Debian) PHP/8.0.10 (internal dummy connection)",
127.0.0.1 - - [30/Sep/2021:05:48:06 +0000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.48 (Debian) PHP/8.0.10 (internal dummy connection)",
127.0.0.1 - - [30/Sep/2021:05:48:07 +0000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.48 (Debian) PHP/8.0.10 (internal dummy connection)",
10.12.7.4 - - [30/Sep/2021:05:49:29 +0000] "GET /login HTTP/1.1" 200 8462 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:49:30 +0000] "GET /core/img/favicon.ico HTTP/1.1" 200 3810 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:49:30 +0000] "GET /cron.php HTTP/1.1" 200 1607 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:49:36 +0000] "POST /login HTTP/1.1" 500 4811 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:50:01 +0000] "GET /login HTTP/1.1" 200 9130 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:50:03 +0000] "GET /cron.php HTTP/1.1" 200 1607 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:50:27 +0000] "POST /login HTTP/1.1" 500 4811 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:55:57 +0000] "GET /login HTTP/1.1" 200 9134 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:55:58 +0000] "GET /cron.php HTTP/1.1" 200 1607 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36",
10.12.7.4 - - [30/Sep/2021:05:56:04 +0000] "POST /login HTTP/1.1" 500 4811 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36"

and this:

Configuring Redis as session handler

AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.20.0.3. Set the 'ServerName' directive globally to suppress this message

AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.20.0.3. Set the 'ServerName' directive globally to suppress this message

[Thu Sep 30 06:45:03.076581 2021] [mpm_prefork:notice] [pid 1] AH00163: Apache/2.4.48 (Debian) PHP/8.0.11 configured -- resuming normal operations

[Thu Sep 30 06:45:03.077252 2021] [core:notice] [pid 1] AH00094: Command line: 'apache2 -D FOREGROUND'

10.12.7.4 - - [30/Sep/2021:06:45:30 +0000] "GET /login HTTP/1.1" 200 9129 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36"

10.12.7.4 - - [30/Sep/2021:06:45:32 +0000] "GET /cron.php HTTP/1.1" 200 1607 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36"

10.12.7.4 - - [30/Sep/2021:06:45:38 +0000] "POST /login HTTP/1.1" 500 4811 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36"

I’m not sure what happened that may have damaged my install. If it’s something I did, I really wish I could find out what, so I can avoid making the same mistake(s) twice. If there is any other info that you need, please let me know. I’ll grab it as soon as I can.

Moving all efforts to here, since this issue could be related:

Will return if the above issue gets resolved…

And I’m back to square one. After checking my Docker installation and reducing the compose file to just Nextcloud (removed Redis and the rest - reinstalled Nextcloud from scratch), I still get the same errors as in the OP.

the internal server error appears normally when redis and/or mysql is unavailable. did you check both?

did you check nextcloud.log? (should be in /srv/nextcloud/data)

Checked mysql (MariaDB) availability from the host that Nextcloud is on. I can access it just fine. Also tossed Redis out of the equation to simplify things until this is resolved. I can post the log file after I get home from work today.

It ended up being an issue with a temporary setting in MariaDB, in opposed to a connection issue: