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: 20.04.2024 @ 08:11
Script: /board/formmail.php?threadid=923&sid=53d3bd075f4c1ee6baac352e51e4752e
Referer: