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: 21.06.2024 @ 22:17
Script: /wbb2/board.php?boardid=111%3Fsid%3D3f3dd6db8d02fe1c1054a7b7d798c7eb
Referer: