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: 01.05.2024 @ 22:08
Script: /board/search.php?action=user&userid=54&sid=5b7ef83b10540dfc232bbac1b03e62ca
Referer: