LogPlayLevel: QAGame: [2017.06.28-14.09.14:706][ 0]LogLinker:Warning: Unable to load package (../../../QAGame/Content/UMG/UMG_Sprite.uasset). Package contains EditorOnly data which is not supported by the current build.
This does not affect PIE
This is a regression from 4.16.1 as it does not occur at CL 3466753
Result: UMG_Sprite widget is not displayed
Expected: UMG_Sprite is displayed on screen
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-46595 in the post.