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: 28.03.2024 @ 16:05
Script: /board/usercp.php?action=buddy&add=18&sid=887ed1242d40112004c422f1f1ada2b6
Referer: