FragoulisNaval: Unfortunately you tip didn't solve the problem.
this is my config.php file so far: (the red lines have been added, **** placeholder)
<?php
$CONFIG = array (
'memcache.local' => '\\OC\\Memcache\\APCu',
'datadirectory' => '/data',
'instanceid' => 'oca2qlx67y0v',
'passwordsalt' => '****,
'secret' => '****',
'trusted_domains' =>
array (
0 => 'nextcloud.****.duckdns.org',
),
'dbtype' => 'mysql',
'version' => '19.0.0.12',
'overwrite.cli.url' => 'https://nextcloud.****.duckdns.org',
'dbname' => 'nextcloud',
'dbhost' => 'mariadb',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_****',
'dbpassword' => '*hidden*',
'appstoreurl' => 'https://apps.nextcloud.com/api/v0',
'appstoreenabled' => true,
'installed' => true,
);
This is the an error from Nextcloud -> Settings -> Logging
Warning | appstoreFetcher | Could not connect to appstore: cURL error 6: Could not resolve host: apps.nextcloud.com (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) |