SQL-DATABASE ERROR

Database error in (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.4.33
Date: 22.05.2024 @ 17:36
Script: /wbb2/profile.php?userid=7634&sid=b2eb69d9700f72e54eb2f2668ac38b8e
Referer: http://www.friendsbistro.de/wbb2/profile.php?userid=7634&sid=b2eb69d9700f72e54eb2f2668ac38b8e