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 @ 18:31
Script: /wbb2/board.php?boardid=20&sid=2f715aacdc657cb254fad9e7f2cea436
Referer: