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 @ 05:07
Script: /wbb2/board.php?boardid=111%3Fsid%3D0959ca737e2312e07018228d6791dc87
Referer: