Cannot click next in Asset Studio when creating an icon

I had the same problem.

In the Legacy tab, I set the Google Play Store Icon to No and I could pass the first screen.

I had exactly the same problem while I was trying to create adaptive icon from vector graphics.

What helped me was that I need to set Size to 108 dp x 108 dp when I imported Vector Asset (res -> right click -> New -> Vector Asset).

I have faced the same issue with vectors that had a dashed line. Android Studio doesn't support dashed-strokes by default. You can check what is not supported in this link Dashes stroke-dasharray in Android Vector. So in such cases Android Studio just doesn't show any error upfront.

In your case I see its happening even for normal vectors.

To check why its failing notice every time it fails the exclamation mark at the extreme bottom right of Android Studio turns red and flashes. Just close pop up window of Android Studio and click on the red exclamation mark. It will give you the reason why its failing. Although there was nothing much I could do about it maybe you can figure out whats wrong.