KRC shows a black screen when connected but works fine when we connected via private remote control.
Display drivers on the endpoint (the machine that you want to connect to) have a 16-bit color depth which is not compatible with Live Connect.
Note: This article is only for the windows machines
Update the display drivers on the endpoint and it should resolve the issue.
Please review the below articles for further reference:
Remote Control rendering issues
Live Connect terminates immediately when launched