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: 18.06.2024 @ 17:17
Script: /wbb2/board.php?boardid=111%3Fsid%3D29394f225a4de7f23cf906c7743b6f96
Referer: http://friendsbistro.de/wbb2/board.php?boardid=111%3Fsid%3D29394f225a4de7f23cf906c7743b6f96