At startup game on the android device, sprites are not displayed

I tried to add to the project of my sprites, but I have a problem. In the viewport sprites are displayed correctly, but after that I’m package the project and run the game, the sprites are not displayed. In my project, I use assembly sprites - “Medieval 2D Art Bundle” sprites used in this package are displayed on a device normally. I tried to use a new, empty project, but even there, my sprites are not displayed. Why is this happening?

Sorry for my English is not my native language

In previous versions, everything was ok.