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 @ 09:43
Script: /wbb2/usercp.php?action=buddy&add=545&sid=57628aa2548d6917590a8a178679271d
Referer: