Internal Server Error after upgrade to Nextcloud 15, can't access to web GUI

Nextcloud version : 15.0.2
Operating system and version : Debian 9.6
Apache or nginx version : Apache/2.4.35
PHP version : 7.3

The issue you are facing:
I performed an update from Nextcloud 14 to Nextcloud 15.0.12 last week. The firsts tests were ok, everything was running well on the clients (Android, GNU/Linux, Windows) and on the web GUI as well.
Trying to acces the web client yesterday I have only an “Internal Server Error” message (in french) plus the distant address and the request ID.
The software clients are still working.

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

Steps to replicate it:

  1. Upgrade from Nextcloud 14 to Nextcloud 15
  2. Wait
  3. Try to access the web client

The output of your Nextcloud log in Admin > Logging:
Entries filtered with the request ID

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

$CONFIG = array (
  'instanceid' => '*********',
  'passwordsalt' => '******************',
  'datadirectory' => '/srv/data/web/vhosts/',
  'overwritewebroot' => '/owncloud',
  'overwrite.cli.url' => '',
  'dbtype' => 'mysql',
  'version' => '',
  'dbname' => 'owncloud',
  'dbhost' => 'localhost',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'oc_user',
  'dbpassword' => '*************************',
  'installed' => true,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'theme' => '',
  'maintenance' => false,
  'trusted_domains' => 
  array (
    0 => '',
  'loglevel' => 0,
  'share_folder' => '/Shared',
  'mail_smtpmode' => 'php',
  'secret' => '****************************************************',
  'trashbin_retention_obligation' => 'auto',
  '' => 'production',
  'mail_from_address' => 'user1',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_domain' => '',

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

Apache access.log

Nothing relevant in error.log

Rolled back to Nextcloud 14 with data and database backup, everything fine. Will try an other upgrade soon.

If you made sure that the web server is running you need to check the Nextcloud log file for further details :wink:

i joined them :wink:

There is only one exception logged that a path couldn’t be created :thinking: