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: 23.04.2024 @ 10:48
Script: /board/formmail.php?threadid=651&sid=15deb25ddd7ce7eac218466c26f04cab
Referer: