SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Access denied for user 'styleschule'@'localhost' (using password: YES)
mysql error number: 1045
mysql version: unknown
php version: 5.6.40
Date: 25.04.2024 @ 19:57
Script: /board.php?boardid=250&page=1&daysprune=1000&sortfield=topic&sortorder=ASC&sid=872a6d6081a35ff2fa55fb94c30cb1a1
Referer: