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: 06.07.2024 @ 15:14
Script: /wbb2/board.php?boardid=111%3Fsid%3D3bd3111ff86ac0aea6400a3746994bc2
Referer: