Website internal error

Hi, when I go into my website, it says:

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 have asked a support team and they disabled the .htaccess files in the home and data folders, however the error persists.

Here are some information that i have gathered:
Config.php file:

<?php $CONFIG = array ( 'instanceid' => 'ocd1o9xzfl2a', 'passwordsalt' => 'j9ln/BQb6cvslfnD3zAb8IH/BTri7r', 'secret' => 'DKn9Kb+2nSjCiIWf4BFJqFQuiDUNVtg1jnOnpdKMob13TpJu', 'trusted_domains' => array ( 0 => 'cloudstorage.pgps-scouts.digital', ), 'datadirectory' => '/srv/disk3/3755202/www/cloudstorage.pgps-scouts.digital/data', 'dbtype' => 'mysql', 'version' => '21.0.2.1', 'overwrite.cli.url' => 'http://cloudstorage.pgps-scouts.digital', 'dbname' => '3755202_cloudstorage', 'dbhost' => 'pdb26.awardspace.net', 'dbport' => '3306', 'dbtableprefix' => 'oc_', 'mysql.utf8mb4' => true, 'dbuser' => '3755202_cloudstorage', 'dbpassword' => 'NMOgzE7m7%((Iy7o', 'installed' => true, ); data/nextcloud.log files: {"reqId":"YMMeiLmwKJsAAHcROsMAAAAG","level":2,"time":"2021-06-11T08:27:52+00:00","remoteAddr":"46.249.93.37","user":"--","app":"no app in context","method":"GET","url":"/","message":"Could not detect any host in http:///data/htaccesstest.txt","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0","version":""} {"reqId":"YMMeiLmwKJsAAHcROsMAAAAG","level":2,"time":"2021-06-11T08:27:52+00:00","remoteAddr":"46.249.93.37","user":"--","app":"no app in context","method":"GET","url":"/","message":"Could not detect any host in https:///data/htaccesstest.txt","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0","version":""} {"reqId":"YMMe1LmwKJsAAHMroocAAABI","level":2,"time":"2021-06-11T08:29:09+00:00","remoteAddr":"46.249.93.37","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:89.0) Gecko/20100101 Firefox/89.0","version":""} {"reqId":"YMMe1LmwKJsAAHMroocAAABI","level":2,"time":"2021-06-11T08:29:09+00:00","remoteAddr":"46.249.93.37","user":"--","app":"no app in context","method":"POST","url":"/index.php","message":"Could not detect any host in https:///data/htaccesstest.txt","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0","version":""}