SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Access denied for user 'syrus'@'localhost' (using password: YES)
mysql error number: 1045
mysql version: unknown
php version: 5.6.38-0+deb8u1
Date: 03.05.2025 @ 15:01
Script: /WoltLab%20Burning%20Board%202.3.6/wbb2/
Referer: http://www.syrus.icb.at/WoltLab%20Burning%20Board%202.3.6/wbb2