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: 07.06.2024 @ 08:19
Script: /wbb2/board.php?boardid=111%3Fsid%3D501a2521c624b71f641ffc80225adc69
Referer: