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 @ 21:45
Script: /board/search.php?action=user&userid=3&sid=99c14b81c855d1a525081eb9e0ff2b87
Referer: