Export circular frame with arcmap

I need your help please

I’m trying to create an inset as a rounded data frame within my main map.

I used 100% rounding for both my background and border to create a circular frame.

When I export the output map, there a square white border around my frame (attached image).

Is there any way to remove that?

Thanks

Hi Rasha,
You should search and then ask this in a different forum I believe. This question has little to do with SNAP or Satellite data. I have often used https://gis.stackexchange.com very successfully for questions like this.