When I try to run the library viz-js usingIPython.display.HTML it doesn't load the variable Viz successfully. The same problem applies to several other libraries like Plotly, Chartjs and TensorflowJs.

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Note: When you are done with these instructions, do not run your code using the green triangular Run button (since that fails in some cases in this setup). Instead, to run your code, press cmd+b or ...