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: 18.08.2018 @ 01:07
Script: /wbblite/board.php?boardid=2&sid=47094dbe778c1358aa1b61af57f4d63e
Referer: