my virtual device in android studio does not open my application

I was creating an application, and shortly after adding strings to some textviews I tried to do a test, I selected my virtual device, however, when the device started a white screen with the google symbol and a loading bar appeared, like of course, but the upload never ends, android studio informed me 2 problems, I believe the first is responsible for this: 1-emulator unable to open app ... permission denied. 2-null value in entry, incremental folder = null ... I would like to know what I do to solve the problem.