Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 24.0.5
Operating system and version (eg, Ubuntu 20.04): TrueNAS-13.0-U2
Apache or nginx version (eg, Apache 2.4.25): replace me
PHP version (eg, 7.4): replace me
The issue you are facing:
Is this the first time you’ve seen this error? (Y/N): YES
Steps to replicate it:
- Go to main nextcloud website
- You will get a message saying "Internal Server Error
The server encountered an internal error and was unable to complete your request.
Please contact the server administrator if this error reappears multiple times, please include the technical details below in your report.
More details can be found in the server log."
I can’t access the main UI interface, admin panel or login screen. Just this plain text message. The ONLY THING I did was what I do always, go to Plugins section inside TrueNAS and update the plugin Nextcloud to the latest version 
The output of your Nextcloud log in Admin > Logging:
PASTE HERE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'apps_paths' =>
array (
0 =>
array (
'path' => '/usr/local/www/nextcloud/apps',
'url' => '/apps',
'writable' => true,
),
1 =>
array (
'path' => '/usr/local/www/nextcloud/apps-pkg',
'url' => '/apps-pkg',
'writable' => false,
),
),
'logfile' => '/var/log/nextcloud/nextcloud.log',
'memcache.local' => '\\OC\\Memcache\\APCu',
'filesystem_check_changes' => 1,
'one-click-instance' => true,
'one-click-instance.user-limit' => 100,
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'localhost',
),
'passwordsalt' => '',
'trusted_domains' =>
array (
0 => 'localhost',
1 => '10.0.1.38',
2 => 'sync.XXXX.com',
),
'datadirectory' => '/usr/local/www/nextcloud/data',
'dbtype' => 'mysql',
'version' => '24.0.4.1',
'overwrite.cli.url' => 'http://localhost',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'oc_ncadmin',
'dbpassword' => '',
'installed' => true,
'instanceid' => 'ocwywlo0qivq',
'twofactor_enforced' => 'false',
'twofactor_enforced_groups' =>
array (
0 => 'admin',
),
'twofactor_enforced_excluded_groups' =>
array (
),
'maintenance' => false,
'updater.release.channel' => 'stable',
'theme' => '',
'loglevel' => 2,
);
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
PASTE HERE
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
https://pastebin.com/mK3N9Ua9