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: 27.06.2024 @ 00:36
Script: /wbb2/board.php?boardid=111%3Fsid%3D302074e6183037763f48a3e1c03f5c95
Referer: