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: 26.06.2024 @ 17:25
Script: /wbb2/board.php?boardid=111%3Fsid%3D24e944b03e0e010be0df8c202637f877
Referer: