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: 23.04.2024 @ 14:46
Script: /board/usercp.php?action=addsubscription&boardid=5&sid=3671e9a18f6e6f358e5d56734fca3b27
Referer: