Marker not showing

I have installed this Plugin and inserted the shortcode in one page.

The shortcode is as follows: [pw_map address=”Soldado de la Independencia 1375, Ciudad de Buenos Aires, Argentina” key=”AIzaSyAg_OiQpIQ43Sc77jIadSpoY22zb8AJe4I”]

The map shows up in the page, but there is no marker.

This is the url of the live site: https://phisigmainteractive.com/modelo3d/studio-apartment-sfo/skinned/ (this is a sample page I am working on before launching it live with real content)

It must be a very simple thing, but unfortunately I have not the programming skills needed to find the origin of the problem.

If anybody could help me, I will appreciate it.

Thanks in advance.
Jorge