UBB.threads PHP Forum Software Community Forums UBB.threads Installation and Upgrade Support Upgraded to ver8 - now can't login

Hello,

I have the white page on PHP 8.3 as well as 7.3... (the background installation on the server is ISPConfig), it worked on a 7.5.6 version with PHP 5.3x. This is a new installation from scratch and new forum.

https://www.finalemus.com/admin/dashboard.php

also

admin/phpinfo.php works fine
/admin/primary.php also comes up blank.

Thank you