Hi all,
I had a similar issue when deploying on heroku. It would get stuck loading. I added the enableCORS=false to my setup.sh file and it worked for the simple data frames and charts examples from the ‘Get Started’ page.
I tried deploying the The Data Explorer app to heroku but I am getting the same errors I was getting on my Mac:

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Funny thing is that the app works when I run it on locally on my machine:

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