SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Access denied for user 'PPGClansql1'@'localhost' (using password: YES)
mysql error number: 1045
mysql version: unknown
php version: 5.6.40
Date: 28.04.2024 @ 17:00
Script: /calendar.php?sid=a5a994cd5a181b3bf677e2882a8a8fc8
Referer: http://mainboard.ppg-clan.de/calendar.php?sid=a5a994cd5a181b3bf677e2882a8a8fc8