Not being able to connect to the api server is not a Rhino problem. It’s a problem with your network that you will have to solve somehow. I’m not sure what “Restoring” your firewall means. You should try to completely disable it.
-wim
I faced this issue. The problem was with host file of the windows. api.mcneel was redirected to 0.0.0.0
If anyone experience this issue, remove this entry from the hostfile.
Hosts file is located at:
C:\windows\System32\Drivers\Etc. Open the hosts file with notepad. remove the line that reads " 0.0.0.0 api.mcneel.com"
save the file.
re-run the rhino.