@sijad
Yes, .tk was the problem
Solved when replace SteamAuthController.php strings with that
[
'openid.ns' => 'http://specs.openid.net/auth/2.0',
'openid.mode' => 'checkid_setup',
'openid.identity' => 'http://specs.openid.net/auth/2.0/identifier_select',
'openid.claimed_id' => 'http://specs.openid.net/auth/2.0/identifier_select',
'openid.return_to' => (string) 'https://www.main.baxandrei.ro/rounturnedlogin/',
// TODO: fix in subfolder issue, not sure if steam needs host name or flarum baseurl
'openid.realm' => (string) 'https://www.main.baxandrei.ro',
]
and added a .httacces on specified url to redirect to .tk login url:
Redirect /rounturnedlogin/ https://www.unturnedromania.tk/auth/steam