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 @ 05:25
Script: /board/search.php?action=user&userid=66&sid=084a6a8c31d7d79498de2601b73e660c
Referer: