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: 21.06.2021 @ 14:50
Script: /addreply.php?postid=69115
Referer: