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: 25.05.2022 @ 11:10
Script: /board/board.php?boardid=4&sid=49b3433f8aece345f34e8d82dee4eeda
Referer: