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: 29.06.2024 @ 19:38
Script: /wbb2/board.php?boardid=111%3Fsid%3D31aa066ec86836d6101d4f8165672f8c
Referer: