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 @ 11:16
Script: /board/search.php?action=user&userid=18&sid=98c12f1c129e26ec3d6158970149e630
Referer: