Nextcloud DB error on Libreelec Docker Setup

Hallo Zusammen

ich habe eine RPI 3B+ und darauf läuft Libreelec da ich Kodi am Anfang hauptsächlich nutzen wollte. Nun habe ich über das repo linuxserver.io docker und nextcloud installiert. Hat auf Anhieb alles geklappt und ich erhielt den Startbildschirm wo ich user password und den Storage sowie die DB angeben musste.

Ich habe ja bis zu diesem Punkt keine USer oder Datenbanken definiert nun ist die Frage muss ich das manuell in der Shell machen? Wenn ja wie gehe ich da vor?

Aktuel erhalte ich den Fehler beim Aufruf meiner nextcloud über den browser:
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 webserver log.

Anbei einige infos:

/storage/.kodi/userdata/addon_data/docker.linuxserver.nextcloud/config/www/nextcloud/config/config.php:

 <?php
$CONFIG = array (
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'datadirectory' => '/data/storage',
  'instanceid' => 'REMOVED BY Mod (JK)',
  'passwordsalt' => 'REMOVED BY Mod (JK)',
  'secret' => 'REMOVED BY Mod (JK)',
  'trusted_domains' =>
  array (
    0 => '192.168.0.10',
  ),
  'dbtype' => 'pgsql',
  'version' => '20.0.3.2',
  'overwrite.cli.url' => 'https://192.168.0.10',
  'dbname' => 'nextcloud',
  'dbhost' => 'db',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'REMOVED BY Mod (JK)',
  'dbpassword' => 'REMOVED BY Mod (JK)',
);

/.kodi/userdata/addon_data/docker.linuxserver.nextcloud/data/nextcloud.log:
{“reqId”:“fJSMSqPmvz6inVMdFMrh”,“level”:2,“time”:“2020-12-29T12:33:39+00:00”,“remoteAddr”:“192.168.0.21”,“user”:"–",“app”:“no app in context”,“method”:“POST”,“url”:"/index.php",“message”:“Could not detect any host in http:///data/htaccesstest.txt”,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0”,“version”:""}

/.kodi/userdata/addon_data/docker.linuxserver.nextcloud/config/log/nginx
Stack trace:
#0 /config/www/nextcloud/lib/base.php(162): OC\AllConfig->__construct(Object(OC\SystemConfig))
#1 /config/www/nextcloud/lib/base.php(576): OC::initPaths()
#2 /config/www/nextcloud/lib/base.php(1091): OC::init()
#3 /config/www/nextcloud/index.php(35): require_once(’/config/www/nex…’)
#4 {main}
thrown in /config/www/nextcloud/lib/private/AllConfig.php on line 76" while reading upstream, client: 192.168.0.1, server: _, requ
est: “GET / HTTP/2.0”, upstream: “fastcgi://127.0.0.1:9000”, host: “testnextcloud.ddns.net
2020/12/29 14:31:01 [error] 376#376: *1 FastCGI sent in stderr: “PHP message: PHP Warning: include(/config/www/nextcloud/lib/compos
er/composer/…/…/…/lib/private/Cache/CappedMemoryCache.php): failed to open stream: No such file or directory in /config/www/nextc
loud/lib/composer/composer/ClassLoader.php on line 444PHP message: PHP Warning: include(): Failed opening ‘/config/www/nextcloud/li
b/composer/composer/…/…/…/lib/private/Cache/CappedMemoryCache.php’ for inclusion (include_path=’.:/usr/share/php7’) in /config/ww
w/nextcloud/lib/composer/composer/ClassLoader.php on line 444” while reading response header from upstream, client: 192.168.0.1, ser
ver: _, request: “GET / HTTP/2.0”, upstream: “fastcgi://127.0.0.1:9000”, host: “testnextcloud.ddns.net
2020/12/29 14:31:01 [error] 376#376: *1 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught Error: Class ‘OC\Cache\Capp
edMemoryCache’ not found in /config/www/nextcloud/lib/private/AllConfig.php:76