Plotly Express Graphs not rendering in Spyder

Plotly Express 4.0 is supposed to be displayable anywhere according to the latest announcement

I have used fig.show() commands in Spyder version 3.3.6 console, but they only show a small blank space and don’t render the actual graphs.
Conda Info:

conda version : 4.7.10
conda-build version : 3.18.8
python version : 3.7.3.final.0
user-agent : conda/4.7.10 requests/2.22.0 CPython/3.7.3 Windows/10 Windows/10.0.17763

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