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: 15.05.2024 @ 04:31
Script: /wbb2/board.php?boardid=113&sid=70d5b34104fb175dffb3f8d4c6c52ce1
Referer: