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 @ 00:27
Script: /board/search.php?action=user&userid=53&sid=5dab0b3fe9c648cb9be0f487f7dcf490
Referer: