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: 03.06.2024 @ 14:04
Script: /wbb2/board.php?boardid=111%3Fsid%3Dc0795a44932fcf3ff476cda9a5c88df8
Referer: