Internal Server Error with no log info (Docker install)

Hello, i have this problem where by accessing my nextcloud website i get this message: Internal Server Error
After installation all worked well for few weeks. Then this error occured. I couldn’t figure a solution and after few days of doing nothing it started to work again.
Now it happened again.

I found this topic “URL” that is similar, but the solution works not for me, probably because of system differences. I can not find sutch files.
My system. I have OMV debian installed with docker and portainer. My Nextcloud and mariaDB are instaled via containers. I use nginx proxy manager on my Home Assistant(other PC) as a reverse proxy for accessing my nextcloud from outside.

Please help me to direct me to the right direction

[/details]
Syster info from within the nextcloud container:
Nextcloud version : 23.0.2
Operating system and version : Debian GNU/Linux 11 (bullseye)
Apache or nginx version : Apache/2.4.52 (Debian)
PHP version : PHP 8.0.17

The issue you are facing:

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.

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

The last few lines from output of my nextcloud.log, there is nothing just like in “URL” :

{"reqId":"BTZAwb7n17oXQ1F5xE7X","level":3,"time":"2022-04-18T22:10:52+00:00","remoteAddr":"78.98.93.56","user":"Tomas","app":"PHP","method":"PUT","url":"/remote.php/dav/uploads/Tomas/b1ea74440a7e61e87d2c07ab94511ada/0000000000000000-0000000001918564","message":"fwrite(): Write of 9608 bytes failed with errno=28 No space left on device at /var/www/html/lib/private/Log/File.php#89","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.19.1","version":"23.0.3.2"}
{"reqId":"xQajV95GSsXyANSNyCVV","level":3,"time":"2022-04-18T22:11:16+00:00","remoteAddr":"78.98.93.56","user":"Tomas","app":"PHP","method":"PUT","url":"/remote.php/dav/uploads/Tomas/6b7c41bd677f537b71e506ccfc144c32/0000000000000000-0000000005705998","message":"file_put_contents(): Write of 8192 bytes failed with errno=28 No space left on device at /var/www/html/lib/private/Files/Storage/Local.php#282","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.19.1","version":"23.0.3.2","exception":{"Exception":"Error","Message":"file_put_contents(): Write of 8192 bytes failed with errno=28 No space left on device at /var/www/html/lib/private/Files/Storage/Local.php#282","Code":0,"Trace":[{"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::","args":[8,"file_put_contents(): Write of 8192 bytes failed with errno=28 No space left on device","/var/www/{"reqId":"xQajV95GSsXyANSNyCVV","level":4,"time":"2022-04-18T22:11:16+00:00","remoteAddr":"78.98.93.56","user":"Tomas","app":"webdav","method":"PUT","url":"/remote.php/dav/uploads/Tomas/6b7c41bd677f537b71e506ccfc144c32/0000000000000000-0000000005705998","message":"Error while copying file to target location (copied: -1 bytes, expected filesize: 5705998 bytes)","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.19.1","version":"23.0.3.2","exception":{"Exception":"Sabre\\DAV\\Exception","Message":"Error while copying file to target location (copied: -1 bytes, expected filesize: 5705998 bytes)","Code":0,"Trace":[{"file":"/var/www/html/apps/dav/lib/Connector/Sabre/Directory.php","line":155,"function":"put","class":"OCA\\DAV\\Connector\\Sabre\\File","type":"->","args":[null]},{"file":"/var/www/html/apps/dav/lib/Upload/UploadFolder.php","line":45,"function":"createFile","class":"OCA\\DAV\\Connector\\Sabre\\Directory","type":"->","args":["0000000000000000-0000000005705998",null]},{"file":"/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php","line":1098,"function":"createFile","class":"OCA\\DAV\\Upload\\UploadFolder","type":"->","args":["0000000000000000-0000000005705998",null]},{"file":"/var/www/html/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":504,"function":"createFile","class":"Sabre\\DAV\\Server","type":"->","args":["uploads/Tomas/6b7c41bd677f537b71e506ccfc144c32/0000000000000000-0000000005705998",null,null]},{"file":"/var/www/html/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPut","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["method:PUT",[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/var/www/html/apps/dav/lib/Server.php","line":339,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/var/www/html/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->","args":[]},{"file":"/var/www/html/remote.php","line":166,"args":["/var/www/html/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/html/apps/dav/lib/Connector/Sabre/File.php","Line":249,"CustomMessage":"--"}}
{"reqId":"xQajV95GSsXyANSNyCVV","level":3,"time":"2022-04-18T22:11:16+00:00","remoteAddr":"78.98.93.56","user":"Tomas","app":"PHP","method":"PUT","url":"/remote.php/dav/uploads/Tomas/6b7c41bd677f537b71e506ccfc144c32/0000000000000000-0000000005705998","message":"fwrite(): Write of 9608 bytes failed with errno=28 No space left on device at /var/www/html/lib/private/Log/File.php#89","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.19.1","version":"23.0.3.2"}
{"reqId":"cnTsF2lU5d9w1hD7a0qp","level":3,"time":"2022-04-18T22:11:27+00:00","remoteAddr":"78.98.93.56","user":"Tomas","app":"PHP","method":"GET","url":"/index.php/apps/files/api/v1/thumbnail/256/256/Ostatne/Mobil%20cloud/Doma/IMG_20210131_182506_BURST21.jpg","message":"file_put_contents(): Write of 169581 bytes failed with errno=28 No space left on device at /var/www/html/lib/private/Files/Storage/Local.php#282","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.19.1","version":"23.0.3.2","exception":{"Exception":"Error","Message":"file_put_contents(): Write of 169581 bytes failed with errno=28 No space left on device at /var/www/html/lib/private/Files/Storage/Local.php#282","Code":0,"Trace":[{"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::","args":[8,"file_put_contents(): Write of 169581 bytes failed with errno=28 No space left on dev

My config.php file :

<?php
$CONFIG = array (
  'htaccess.RewriteBase' => '/',
  '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' => 'oc0i7iuemm02',
  'passwordsalt' => 'NZTPGnGeygnhPSm27Y65AJ7H4snzRo',
  'secret' => 'DWwchFTgbSScmbb42ZXreIS+nRwcylnucuDZAsJd/lyfxwix',
  'trusted_domains' => 
  array (
    0 => '192.168.1.111:8080',
    1 => 'mydomain.duckdns.org',
  ),
  'trusted_proxies' => 
  array (
    0 => '192.168.1.115',
  ),
  'overwriteprotocol' => 'https',
  'datadirectory' => '/var/www/html/data',
  'dbtype' => 'mysql',
  'version' => '23.0.3.2',
  'overwrite.cli.url' => 'http://192.168.1.111:8080',
  'dbname' => 'nextcloudDB',
  'dbhost' => '172.17.0.3:3306',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => 'oc_admin1',
  'dbpassword' => 'VN6S50DVRYN6NqdPbiRZ2X0sGqBuJa',
  'installed' => true,
  'mail_from_address' => 'TT',
  'mail_smtpmode' => 'smtp',
  'mail_sendmailmode' => 'smtp',
  'mail_domain' => 'gmail.com',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpsecure' => 'ssl',
  'mail_smtpauth' => 1,
  'mail_smtphost' => 'smtp.gmail.com',
  'mail_smtpport' => '465',
  'mail_smtpname' => 'myMail@gmail.com',
  'mail_smtppassword' => 'password',
  'updater.secret' => '$2y$10$jI2TJvTarG4.5nCEPp/s/OD3.FRygCCLSoJFY4jGFug2RJKrMJgyK',
  'loglevel' => 4,
  'maintenance' => false,
  'default_phone_region' => '<SK>',
);

I add here any information that you ask for but please be patient with me because i am a Windows user and only a linux beginner…

Thank you for your response or ideas

internal server error → backend problems (database, redis) not working. you may check the logs of these container.