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: 22.05.2024 @ 16:28
Script: /wbb2/board.php?boardid=101&sid=0d43d09acfe680a54a0bedd22cd8918c
Referer: http://www.friendsbistro.de/wbb2/board.php?boardid=101&sid=0d43d09acfe680a54a0bedd22cd8918c