SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Link-ID == false, connect failed
mysql error: The server requested authentication method unknown to the client
mysql error number: 2054
Date: 20.04.2024 @ 13:11
Script: /board/usercp.php?action=signature_edit&sid=c834343613b35ca27b2d0494356cf801
Referer: