I checked the behavior of importing a mobile map package in ArcGIS Explorer.
A picture is not displayed that I input the absolute pass in 'Configure Pop-ups' in ArcGIS Pro.
This behavior is not relied on the data.
(Reproduced Steps)
ArcGIS Pro 3.0.3
1.Make a point feature class of a file geodatabase.
2.In Contents panel, Click > Configure Pop-ups > Image > Edit Pop-ups
3.Input a pass to a picture to 'URL' and 'Hyperlink'.
C:\Temp\Picture_01.png
4.Create a Mobile Map package.
ArcGIS Explorer 21.0.2 Build 670
1.Import a Map
2.Click a point > Media
3.The message 'picture is not able to imported'.
Thank you in any advice.
