Figures are not shown on slides

[Hamid Khodabandehloo]

When I convert my Jupiter notebook to an HTML slide, none of the gmaps figures are being shown. I use the following code to export the HTML slide:

jupyter nbconvert slide_deck.ipynb --to slides --post serve --template output_toggle --reveal-prefix=reveal.js --post serve

I do not have any error on the export logs and all other figures (matplotlib, seaborn and plotly figures) are being converted without any issue.