Why should I export a little project? I want the one I'm working on. Is there any issue with latest release or some server?
I had the same problem yesterday because I purchased it only two days ago. I also sent an email requesting a refund, but for some reason, it's working fine today and the build was successful. It's also an Android app. I'm not sure when C3 will support building locally without using your servers, including exporting Cordova projects.