I have the same issue.

A plain vanilla install continually results in either of the following.

Established, waiting for incoming data...
...or...
Screen sharing is paused by remote computer

It's a shame. The website suggested this may be a reasonable alternative to Teamviewer and others, but with this being a common problem, and with this thread not being updated for 2 months, it's obviously not yet ready for a production environment.

Good luck with the project though. I'd definitely be interested in it and be willing to pay a subscription once it's stable and usable.