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: 20.05.2024 @ 21:08
Script: /wbb2/jgs_portal.php?sid=e28697b5e3547dd36feb2aed1bd7315c
Referer: http://www.friendsbistro.de/wbb2/jgs_portal.php?sid=e28697b5e3547dd36feb2aed1bd7315c