Skeletal mesh is not visible in mobile preview after updating to UE4.21

For anyone in the position of being unable to accommodate this change and who is also on a source build, this version of SkinnedMeshComponent.cpp will solve this issue:

https://raw.githubusercontent.com/EpicGames/UnrealEngine/af90b7bcd4205ef7a3954974a9c0fa109d2b5d34/Engine/Source/Runtime/Engine/Private/Components/SkinnedMeshComponent.cpp?token=AH22uLvZ5q41ohIpuUXcvNm0jNkMbd0Gks5cWtzxwA%3D%3D