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: 5.6.40-70+0~20240421.84+debian11~1.gbp0c0ec4
Date: 14.05.2024 @ 20:56
Script: /main/register.php?sid=c700c8da1179a4ce2846023d3d51d41a
Referer: