Found nil between 2 viewcontrollers #2

hi everyone
so i'm using this library on one of my projects and it's working fine between a collectionviewCell and a detailVC, but when i try to go from that "detailVC" to "anotherVC" i am getting the "unexpectedly found nil while implicitly unwrapping an optional value", in fact the imageView on the "anotherVC" is returning nil on the Match
i get rid of the error by using : anotherVC.loadViewIfNeeded()
but i am not getting the transition effect between my imageViews now
thanks