Hello! I'm new to ArcGIS and I'm trying to create a Story Map Tour using a georeferenced scan that I've uploaded to My Maps. (I followed all the steps in this tutorial to georeference the image.) When I go to build the Tour and select my custom basemap in Map Options, however, the map I select doesn't actually show up in the Tour builder. I just get a blank, completely gray background for my first tour point. Any advice is appreciated!