SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Link-ID == false, connect failed
mysql error: Access denied for user 'HTO01FLBUQTS'@'c4aweb29.aul.t-online.de' (using password: YES)
mysql error number: 1045
Date: 22.08.2018 @ 06:13
Script: /wbblite/board.php?boardid=6&sid=905c0c551225d74652a899b7b4f107cf
Referer: