SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.3.31-1~deb10u1
Date: 27.04.2024 @ 16:37
Script: /usercp.php?action=buddy&add=9458&sid=0679e5275d1fc4a1a151ffc4ca3d766e
Referer: