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: 05.07.2024 @ 07:04
Script: /wbb2/board.php?boardid=111%3Fsid%3D5a649f1367d1b119fe6cab75538e3600
Referer: