SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Access denied for user 'web6'@'localhost' (using password: YES)
mysql error number: 1045
mysql version: unknown
php version: 5.6.40-68+0~20230902.80+debian11~1.gbpa2012b
Date: 23.04.2024 @ 08:25
Script: /main/addreply.php?action=quote&postid=9424&sid=0577a43d7d762d3bbddc1d2ac9d8e51f
Referer: