SQL-DATABASE ERROR

Database error in (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.4.33-nmm5
Date: 01.07.2024 @ 13:16
Script: /wbb2/board.php?boardid=111%3Fsid%3D52cb9e581b9a6c27f8ebd254e83c4aca
Referer: