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: 08.06.2024 @ 20:35
Script: /wbb2/board.php?boardid=111%3Fsid%3Dfe5170a2d68056378e65e4a8ec10cd28
Referer: http://friendsbistro.de/wbb2/board.php?boardid=111%3Fsid%3Dfe5170a2d68056378e65e4a8ec10cd28