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Okay, I havent changed anything and the components are now showing but it's not showing the RSS feed, I followed your tutorial, appery proxy is checked, but no feed shows in the grid component.
It broke just by pressing "Open" 
You guys need to go back to the drawing board - seriously.
Please share the app with a href="mailto:support@appery.io" rel="nofollow"support@appery.io/a.
Check if there are any errors in the browser console.
done...
I was instantly able to open the app.
What browser did you try? Can you clear the browser cache and try it again?