SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Authentication plugin 'mysql_clear_password' cannot be loaded: plugin not enabled
mysql error number: 2059
mysql version: unknown
php version: 5.6.40
Date: 25.09.2021 @ 17:19
Script: /thread.php?threadid=295764
Referer: http://buyactive.com/forums/index.php?action=profile;u=26760;area=showposts;start=375