Why can't I connect via RDP?

Question

System administration

We have:
Client - Windows 10 Pro
Server - Windows Embedded 8.1 Industry Enterprise
Everything is on the local network
When you try to connect from the client via RDP, authorization is requested and after the error "Login attempt failed"
At the same time, when connecting from the Android application, everything happens fine.

Event Log Entries:
Server accepted new client
connection Connection created
Session started PerfCounter
Server terminated client's connection to URNS
Disconnect reason 0

PERFNT?

Answer 1

https://docs.microsoft.com/en-us/windows-server/re...

Answer 2

perhaps the server has an outdated security level

Answer 3

RDP client and server version possible version compatibility issue