For some reason it does not work for me using regular http only https.
My config file looks like this:
<?php
$CONFIG = array (
  'instanceid' => 'ochlswg2dnqj',
  'passwordsalt' => 'N7C.RmVB3iq4hS9ooVoXaqjCCwfyAs',
  'secret' => 'Oy3TUwALq1mn6HYbPX2Q1WRQAGw3Ax9TH2AKL6.MwcPSGAe9',
  'trusted_domains' =>
  array (
    0 => '192.168.1.99',
  ),
  'datadirectory' => '/mnt/HD/HD_a2/Nas_Prog/owncloud/owncloud/data',
  'overwrite.cli.url' => 'http://192.168.1.99:441',
  'dbtype' => 'mysql',
  'version' => '8.0.4.2',
  'dbname' => 'owncloud',
  'dbhost' => 'localhost',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'oc_admin',
  'dbpassword' => '7arq1c2pb4v4cny2jp54iv95lmq483',
  'installed' => true,
  'forcessl' => false,
  'forceSSLforSubdomains' => false,
);
What could be the solution?
DNS-327l, 1.04b07 firmware, 192.168.1.99 is the IP address of my NAS on LAN