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 @ 17:17
Script: /board/addreply.php?threadid=951&sid=4e1f168b5a9f0cc5fb4e99183d476adb
Referer: