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 @ 23:49
Script: /wbb2/board.php?boardid=111%3Fsid%3D3abe7b539d5a3c9f28d4e5b4970808c3
Referer: