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/search.php?searchid=218541&sid=d252151e10893cc1b2d47cb8ef4bb788
Referer: https://haumis-wbb-hilfe.de/wbb2/search.php?action=user&userid=485&sid=7ea55f0c6653010aa8976723c0ead822