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: 22.10.2020 @ 23:19
Script: /thread.php?goto=lastpost&threadid=20014
Referer: