Exsternal user triggers AutoloadNotAllowedException

Nextcloud version (eg, 18.0.2): 20.0.0.9
Operating system and version: Ubuntu 20.04 over docker
Apache or nginx version (eg, Apache 2.4.25): nginx (latest after update)
PHP version (eg, 7.1): 7.0

The issue you are facing:

When update i got :

root@c88cdc5bfb59:/var/www/html# sudo -u www-data php ./occ upgrade
An unhandled exception has been thrown:
OCP\AutoloadNotAllowedException: Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php in /var/www/html/lib/autoloader.php:140
Stack trace:
#0 /var/www/html/lib/autoloader.php(165): OC\Autoloader->isValidPath('/var/www/html/c...')
#1 [internal function]: OC\Autoloader->load('OCA\\User_Extern...')
#2 [internal function]: spl_autoload_call('OCA\\User_Extern...')
#3 /var/www/html/lib/private/legacy/OC_User.php(135): class_exists('\\OCA\\User_Exter...')
#4 /var/www/html/lib/base.php(720): OC_User::setupBackends()
#5 /var/www/html/lib/base.php(1092): OC::init()
#6 /var/www/html/console.php(49): require_once('/var/www/html/l...')
#7 /var/www/html/occ(11): require_once('/var/www/html/c...')
#8 {main}root@c88cdc5bfb59:/var/www/html# AutoloadNotAllowedException^C

I need the “user_external” app, i have no internal (not smart of me).

Is this the first time you’ve seen this error? (Y/N): yes

Steps to replicate it:

i did only the update off the docker container and run the update cli in the container

The output of your Nextcloud log in Admin > Logging:

{"reqId":"xYtruc5KsnhxfhHKBQP6","level":3,"time":"2020-10-14T20:47:27+00:00","remoteAddr":"172.19.0.8","user":"--","app":"index","method":"GET","url":"/","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/index.php","line":35,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"xYtruc5KsnhxfhHKBQP6","level":0,"time":"2020-10-14T20:47:27+00:00","remoteAddr":"172.19.0.8","user":"--","app":"files_sharing","method":"GET","url":"/","message":"/appinfo/app.php is deprecated, use \\OCP\\AppFramework\\Bootstrap\\IBootstrap on the application class instead.","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"IZnf6auCLGyrvTqRmbZm","level":3,"time":"2020-10-14T20:48:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"index","method":"GET","url":"/","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/index.php","line":35,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"IZnf6auCLGyrvTqRmbZm","level":0,"time":"2020-10-14T20:48:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"files_sharing","method":"GET","url":"/","message":"/appinfo/app.php is deprecated, use \\OCP\\AppFramework\\Bootstrap\\IBootstrap on the application class instead.","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"c2IjqFxfcgp6JBww1jI7","level":3,"time":"2020-10-14T20:48:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"pgNuTMAmNqPb35HqRsWG","level":3,"time":"2020-10-14T20:48:04+00:00","remoteAddr":"172.19.0.8","user":"--","app":"index","method":"GET","url":"/","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/index.php","line":35,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"pgNuTMAmNqPb35HqRsWG","level":0,"time":"2020-10-14T20:48:04+00:00","remoteAddr":"172.19.0.8","user":"--","app":"files_sharing","method":"GET","url":"/","message":"/appinfo/app.php is deprecated, use \\OCP\\AppFramework\\Bootstrap\\IBootstrap on the application class instead.","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"ABsuP7iLKmgp3l45kH8s","level":3,"time":"2020-10-14T20:48:05+00:00","remoteAddr":"172.19.0.8","user":"--","app":"index","method":"GET","url":"/","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/index.php","line":35,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"ABsuP7iLKmgp3l45kH8s","level":0,"time":"2020-10-14T20:48:05+00:00","remoteAddr":"172.19.0.8","user":"--","app":"files_sharing","method":"GET","url":"/","message":"/appinfo/app.php is deprecated, use \\OCP\\AppFramework\\Bootstrap\\IBootstrap on the application class instead.","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36","version":"20.0.0.9"}
{"reqId":"hqKkI6beiTwBUxNjqaZe","level":3,"time":"2020-10-14T20:49:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"gUZ5r5EIiZDo5dlLhw3m","level":3,"time":"2020-10-14T20:50:02+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"JfZc1YGR7L9lB6jOrdXE","level":3,"time":"2020-10-14T20:51:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"RzN7miK6DPOiCmys0Tph","level":3,"time":"2020-10-14T20:52:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"wwQeSFXrguuZIsFWOTBF","level":3,"time":"2020-10-14T20:53:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"f4OJh3fGz1SPYT47SwYE","level":3,"time":"2020-10-14T20:54:02+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"xWlg2xm1s2epEgFnhlvb","level":3,"time":"2020-10-14T20:55:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"jqzxbt0HM5BfwIPSt00Z","level":3,"time":"2020-10-14T20:56:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"tyTxfbIloXKlHxY7kdbf","level":3,"time":"2020-10-14T20:57:02+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"d5HgZZoH8pWnIiKi2o4n","level":3,"time":"2020-10-14T20:58:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"ZPUSC95h894dZruRcxdf","level":3,"time":"2020-10-14T20:59:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"MYk54si2vhYsj3hAGhc9","level":3,"time":"2020-10-14T21:00:02+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"9IbjbTlZPNoPkXH2ctYE","level":3,"time":"2020-10-14T21:01:02+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"1blw6d6tqOoVgQI237i5","level":3,"time":"2020-10-14T21:02:03+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}
{"reqId":"Nxnl6fD6Loyj0v8JDyYk","level":3,"time":"2020-10-14T21:03:01+00:00","remoteAddr":"172.19.0.8","user":"--","app":"cron","method":"GET","url":"/cron.php","message":{"Exception":"OCP\\AutoloadNotAllowedException","Message":"Autoload path not allowed: /var/www/html/custom_apps/user_external/lib/webdavauth.php","Code":0,"Trace":[{"file":"/var/www/html/lib/autoloader.php","line":165,"function":"isValidPath","class":"OC\\Autoloader","type":"->","args":["/var/www/html/custom_apps/user_external/lib/webdavauth.php"]},{"function":"load","class":"OC\\Autoloader","type":"->","args":["OCA\\User_External\\WebDAVAuth"]},{"function":"spl_autoload_call","args":["OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/private/legacy/OC_User.php","line":135,"function":"class_exists","args":["\\OCA\\User_External\\WebDAVAuth"]},{"file":"/var/www/html/lib/base.php","line":720,"function":"setupBackends","class":"OC_User","type":"::","args":[]},{"file":"/var/www/html/lib/base.php","line":1092,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/autoloader.php","Line":140,"CustomMessage":"--"},"userAgent":"curl/7.58.0","version":"20.0.0.9"}

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'allow_user_to_change_display_name' => false,
  'lost_password_link' => '[REMOVED]',
  'skeletondirectory' => '',
  'overwritehost' => '[REMOVED]',
  'overwriteprotocol' => 'https',
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'apps_paths' => 
  array (
    0 => 
    array (
      'path' => '/var/www/html/apps',
      'url' => '/apps',
      'writable' => false,
    ),
    1 => 
    array (
      'path' => '/var/www/html/custom_apps',
      'url' => '/custom_apps',
      'writable' => true,
    ),
  ),
  'instanceid' => '[REMOVED]',
  'passwordsalt' => '[REMOVED]',
  'secret' => '[REMOVED]',
  'trusted_domains' => [REMOVED],
  'user_backends' => 
  array (
    0 => 
    array (
      'class' => '\\OCA\\User_External\\WebDAVAuth',
      'arguments' => 
      array (
        0 => '[REMOVED]',
      ),
    ),
  ),
  'datadirectory' => '/var/www/html/data',
  'dbtype' => 'mysql',
  'version' => '20.0.0.9',
  'overwrite.cli.url' => '[REMOVED]',
  'dbname' => 'nextcloud',
  'dbhost' => 'dsrbe-mariadb',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => '[REMOVED]',
  'dbpassword' => '[REMOVED]',
  'installed' => true,
  'app_install_overwrite' => 
  array (
    0 => 'caniupdate',
    1 => 'files_clipboard',
    2 => 'uploaddetails',
  ),
  'mail_smtpmode' => 'smtp',
  'mail_smtpsecure' => 'ssl',
  'mail_sendmailmode' => 'smtp',
  'mail_smtphost' => 'send.one.com',
  'mail_smtpport' => '465',
  'mail_smtpauth' => 1,
  'mail_from_address' => 'robots',
  'mail_domain' => '[REMOVED]',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpname' => '[REMOVED]',
  'mail_smtppassword' => '[REMOVED]',
  'loglevel' => 0,
  'maintenance' => false,
  'theme' => '',
);

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

I can't find this log