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 @ 05:31
Script: /board/usercp.php?action=buddy&add=66&sid=d2950e3700b265dd448d17eb1aad587a
Referer: