Widget with RoundedImageView does not render

[HansaExport]

Hi,

I'll try to use the RoundedImageView in a widget, but when I replace my ImageView with the RoundedImageView, the widget is not rendered. Using RoundedImageView in the application/an activity works like a charm.

I found no errors inside my Android Studio, where I can check what's going wrong.

Are there any experiences using RoundedImageView in a widget, or do I have to take anything into account when using this in a widget?