When I swap around 2 Components, in this case, a box collider that was the root and a paper sprite component, and build, the unreal editor crashes.
What I did was change RootComponent = Collider to RootComponent = Sprite and
Sprite->SetupAttachment(RootComponent) to Collider->SetupAttachment(Sprite).
After doing these changes and building the solution UE 4.18.3 crashes.
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