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 @ 15:10
Script: /board/search.php?action=user&userid=54&sid=2a3d8e469a0bccd5474f70cc97758ed4
Referer: