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 @ 04:31
Script: /board/search.php?action=user&userid=50&sid=4e1f168b5a9f0cc5fb4e99183d476adb
Referer: