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 @ 17:18
Script: /board/formmail.php?threadid=923&sid=a80c4da37464191e9e23b58f2c7d01e4
Referer: