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: 03.06.2024 @ 16:22
Script: /wbb2/board.php?boardid=111%3Fsid%3D5ba45371f54b2d26b032946ca59f6bc9
Referer: