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: 25.04.2024 @ 15:10
Script: /board/usercp.php?action=buddy&add=8&sid=2c2f70a57afee1a1c6423b8c8e1ccac8
Referer: