Bug: Camera not found needs a close button

When opening the QR-Code scanner without a camera or without permission to use it, there is no way back into the app. There is the correct message on the screen, but using the back button is the only way out. It does not get you back to the home screen though, instead it opens the last page you visited (quite possibly outside the app).

Please add a button to get back to the home screen:)

Concerns all variants of the app ^^