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 @ 11:45
Script: /wbb2/search.php?searchid=218249&sid=d5f940b314bfe5845eefd3542674ba81
Referer: https://haumis-wbb-hilfe.de/wbb2/search.php?action=user&userid=384&sid=410cb25aabc9c297082a0e31e024b441