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: 15.06.2024 @ 20:18
Script: /wbb2/board.php?boardid=111%3Fsid%3D5ca8c151ba89d3d5cad28205d71c969b
Referer: http://friendsbistro.de/wbb2/board.php?boardid=111%3Fsid%3D5ca8c151ba89d3d5cad28205d71c969b