the (customer's) system seems to be looking for the app's adaptive icons. you don't say why you need to do debugging or if it's the customer who sees these messages, but my guess is the files have been misplaced (perhaps in a move...). look in Objects\res\mipmap-anydpi-v26. what's there? if mipma-anydpid-v26 is even there, you've left a folder and its files somewhere.