SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.4.33
Date: 29.04.2024 @ 06:22
Script: /Forum/formmail.php?userid=2972&sid=6d257ae3a09db8f417e9b5bb8596e845
Referer: