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 @ 00:29
Script: /wbb2/board.php?boardid=111%3Fsid%3Dbbe7b698db473177d94beb8fcf52203f
Referer: http://www.friendsbistro.de/wbb2/board.php?boardid=111%3Fsid%3Dbbe7b698db473177d94beb8fcf52203f