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: 25.04.2024 @ 04:15
Script: /board/search.php?action=user&userid=8&sid=6aff1ac8d8c13992fb6b32354b81dc49
Referer: