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: 02.06.2024 @ 09:33
Script: /wbb2/board.php?boardid=111%3Fsid%3D2474c896a072b92881f760c1e6b58ed6
Referer: