Not working with FlexLayoutmanager

[kaustav07]

if the layoutmanager of the recyclerview is FlexLayoutmanager, this doesn't work and it crashes the app. it gives a error -

java.lang.ClassCastException: androidx.recyclerview.widget.RecyclerView$LayoutParams cannot be cast to com.google.android.flexbox.FlexItem

and moreover if this is in a motionLayout, that crashes as well.. -

unable to parse MotionScene file

if I remove this library releated code then it parses no error.