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 @ 19:06
Script: /wbb2/board.php?boardid=111%3Fsid%3D4b6075fd2ab4bf42e7b9ebcec1fd7c54
Referer: