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: 18.04.2024 @ 11:33
Script: /board/usercp.php?action=buddy&add=50&sid=1fa4b93f4b8f64cac6da2dd1aa43db34
Referer: