The type or namespace name 'TaskStackBuilder' does not exist in the namespace 'Android.Support.V4.App' (are you missing an assembly reference?)

Question

I updated Xamarin.Forms from 4.8 to 5.0 . Also for Xamarin.Forms 5.0 u need to have min Android 10 Target Framework, so i updated from Android 9.0 to Android 10.0. With thi