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: 12.05.2024 @ 15:02
Script: /wbb2/index.php/profile.php?userid=288&sid=03ffd990d5a2318e4934107c8429af7c
Referer: http://friendsbistro.de/wbb2/index.php/profile.php?userid=288&sid=03ffd990d5a2318e4934107c8429af7c