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 @ 00:53
Script: /wbb2/misc.php?action=boardregeln&sid=d8851f08c3eb42a7d7fef7164ccbdf5e
Referer: http://www.friendsbistro.de/wbb2/misc.php?action=boardregeln&sid=d8851f08c3eb42a7d7fef7164ccbdf5e