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: 16.05.2024 @ 09:11
Script: /wbb2/addreply.php?postid=1082778&sid=87d3e7fa40b35a378c9b017ca6c1d4f0
Referer: http://www.friendsbistro.de/wbb2/addreply.php?postid=1082778&sid=87d3e7fa40b35a378c9b017ca6c1d4f0