I was trying to install the plugin to test a simple OpenGL application. If we can develop simple OpenGL or SFML graphical applications that have a display window, then Cloud9 would be a perfect platform for our educational purposes.
In trying to install the plugin, I received the same error that was posted to the github account (https://github.com/shadowcodex/c9.ide.desktop/issues/13)
jpaone:~/plugin/c9.ide.desktop (master) $ c9 install c9.ide.desktop --force Unknown Error getting api.c9.io/packages/c9.ide.desktop/versions/1.0.0/download?access_token=xyz:500
Is this an error on the Cloud9 side or the plugin side?