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 @ 12:02
Script: /board/search.php?action=user&userid=50&sid=ba97ef8184baa2cd49b2b6644181a4d5
Referer: