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 @ 11:55
Script: /board/usercp.php?action=buddy&add=8&sid=49d41f41f9b2d37fae92764b420623fc
Referer: