I’ve seen that when you have an IPv6 address and the RCS (Remote Connection Server) has bound to the v6 address instead of the v4. We’re working on that internally at the moment.
You can check if IPv6 is the issue by opening a Command Prompt and running this:
C:\Users\edwin>hostname
MyMachine
C:\Users\edwin>ping MyMachine
Pinging MyMachine.local [ab:cd:ef::23] with 32 bytes of data:
Reply from ab:cd:ef::23: time<1ms
Reply from ab:cd:ef::23: time<1ms
The tell-tail evidence that your machine has defaulted to IPv6 is that there are colons in the “Reply from” lines there.
If that’s the issue, you can try disabling IPv6 on the RCS machine until we fix it.