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: 14.05.2024 @ 01:19
Script: /wbb2/board.php?boardid=161&sid=74ee42bc75f5ba208e09b2afaa141d02
Referer: http://www.friendsbistro.de/wbb2/board.php?boardid=161&sid=74ee42bc75f5ba208e09b2afaa141d02