I made a custom icon that is not showing

Hi all,
I made a custom icon but when I build it does not show. It use to show perfectly fine but when I updated to the 2018 beta and reimported everything the icon disappeared on my first build. My current course of action has included; uninstalling the game off my phone and reinstalling, and changing the icon to default and back again, and changing the icon’s texture type. None of these have worked. Could it just be a bug with the beta? any advice would be great because I am too far in to restart :frowning:

Please help