RunTimeException in Android espresso when selecting spinner in dialog

Question

I have an activity where some dialog is openend. On this dialog there is a spinner. I want to select a specific value in this spinner, but I get following exception:

Answer 1

I have same issue on Pixel 2 XL with Android Pie and I have to add

.inRoot(isPlatformPopup())

when for EditText appears credentials autofill spinner