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: 25.04.2024 @ 01:57
Script: /board/usercp.php?action=buddy&add=50&sid=ec33b4b8b08c1e96cdc686914547e23a
Referer: