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: 29.03.2024 @ 00:58
Script: /main/board.php?boardid=20&page=1&daysprune=1000&sortfield=starter&sortorder=ASC&sid=366453269805d10dba5e9e1079394e4a
Referer: