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: 16.04.2024 @ 18:48
Script: /board/usercp.php?action=buddy&add=8&sid=8c748c136b9f4b2c1a8dc1c303c76bb5
Referer: