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: 26.04.2024 @ 15:28
Script: /board/formmail.php?threadid=938&sid=b648da77111bc7c8758fcd5257a6d6db
Referer: