extension enabled but no yaml file to tell us how to configure it

[gretelup]

I successfully installed gmaps using conda install -c conda-force gmaps; however, when I try to render a map, it simply returns:

Figure(layout=FigureLayout(height='420px'))

without rendering an image. In my Nbextensions Configuration tab, jupyter-gmaps/extension is checked but highlighted in yellow. When I click on it, I get the following message:

"This nbextension is enabled in the notebook json config, but doesn't provide a yaml file to tell us how to configure it. You can still enable or disable it from here, though."

I do try to enable it there, but it doesn't work. Any advice?