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 @ 21:31
Script: /board/profile.php?userid=66&sid=9120847e5b0b43965ac36d5d9fb60165
Referer: