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: 20.04.2024 @ 15:08
Script: /board/search.php?action=user&userid=6&sid=3a4dde6c7492ecf8631872330c5c71ec
Referer: