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: 08.05.2024 @ 01:48
Script: /board/usercp.php?action=buddy&add=32&sid=2553cbdc54c786a5f453499b5b7c26a9
Referer: