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 @ 07:13
Script: /board/search.php?action=user&userid=54&sid=202e98bffad6a19c9a5c1f16b4dafa45
Referer: