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 @ 11:27
Script: /board/usercp.php?action=buddy&add=54&sid=502dc134424f4f5be36ee3c49cd895a3
Referer: