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 @ 07:41
Script: /wbb2/board.php?boardid=111%3Fsid%3Dbfe70ac9afc12a79eb90d16fa818ed4a
Referer: http://www.friendsbistro.de/wbb2/board.php?boardid=111%3Fsid%3Dbfe70ac9afc12a79eb90d16fa818ed4a