I'm attempting to load a rather large KMZ with images (pop-ups, not overlays) embedded. Importing the geometric types works fine. It also pulls across all the HTML snippet code without problem. However it fails to load the image in the popup, rendering just a box with an X in it. When I load the same KMZ in Google Earth it works fine. When I load it in ArcGIS Earth it also works just fine. In the attribute table, the img src tags are correct; there are no broken links or missing files. Am I missing something?
I am on ArcGIS Pro 2.3.