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 @ 06:50
Script: /board/formmail.php?threadid=918&sid=a02bc4043896d0a76231b0b340c4c566
Referer: