I am sorry if someone already posted this or if this has been resolved I was struggling to find it. I am not a developer and I just wanted to test the UI I created before I continue with my project but when I did this is what was going on. Any help would be appreciated. Also when I go to host my app I just get the documentation page that shows up. Now the prototpyer is not loading 
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There isn’t enough here for folks to jump in and help. Generally speaking your package.json should not be an empty file (which is what your screenshot shows).