I have not been able to connect my first website to your service. In the installer, the message I received was to ask my host if, "Is php on my server properly configured to be able to contact https://premium.wpmudev.org/api/dashboard/v1/ with a POST HTTP request via fsockopen or CURL?"
I did that. BTW - I use SiteGround as my host. I don't know if you have had any issues with them in the past. Anyway, they said that there were no problems with that and the servers were configured to process that request properly.