SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.2.34-nmm9
Date: 22.05.2024 @ 13:01
Script: /wbb2/formmail.php?userid=529&sid=7922b4136f1551b97a6b8100e95871a4
Referer: