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: 01.06.2024 @ 06:19
Script: /wbb2/board.php?boardid=111%3Fsid%3D1ba50e06de0b73378a9c225d7fd2bd0d
Referer: http://www.friendsbistro.de/wbb2/board.php?boardid=111%3Fsid%3D1ba50e06de0b73378a9c225d7fd2bd0d