This is due to the netlogon service not being on. What you can do is:
Connect to the PC that you can't connect to Dameware means via RDP (which weirdly works)
Then type in services via the windows search bar
>look for the Netlogon service
>right click and go to properties
>Turn it from manual to Automatic
Hit start if it isn't running and hit apply and then ok.
You should now be able to remotely connect to the PC now.