I found this message in the toolset dashboard "Toolset needs to connect to its server to check for new releases and security updates. Something in the network or security settings is preventing this. Please allow outgoing communication to toolset.com to remove this notice".
I tryed to create a new site key and tryed to register Toolset with newly generated site key, but the message has not disappeared. I am attaching an image detailing the issue.
It looks like it was a temporary problem, I just logged in to your site with the credentials you provided, and there is no such warning, and looking at the Toolset registration page things look normal.