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: 29.03.2024 @ 09:30
Script: /board/usercp.php?action=buddy&add=6&sid=87dbf4a142e6800272c271f240e9fa75
Referer: