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: 27.10.2020 @ 03:57
Script: /thread.php?threadid=139805&threadview=1&hilight=&hilightuser=0
Referer: