Thanks @Zoohair. I had to deal with similar constraints (workstation without access to the web). Based on your solution I updated my initial question in the plotly section.
Thanks for having shared your solution here!
Perhaps the debugger could be a bit more “verbose” when the default cdn queried by plotly to plot a scatter_geo or any other map cannot be reached. I had to open the brower’s console to figure out what resource was missing.