Unexplained error

Does anyone know why I get this error when I try to test the application?

Thanks for the helpers

Is this for Android?
What is the size and dimensions of the png file, and what is it for ?

The size of the file is 40 KB.
Even though I tried to change the picture, it still doesn't open the option for me to test.
I can download the file afk And it works well...but I can't do a test as long as there are files inside a media folder.