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: 27.04.2024 @ 05:15
Script: /board/formmail.php?userid=1&sid=dbf712b9337ee914b09ebaf1c4c4eca5
Referer: