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: 19.04.2024 @ 00:34
Script: /board/profile.php?userid=1&sid=221cf51ef5487f8ab2c85ee69f5a34ca
Referer: