An Unreal process has crashed: UE4-EpicGamesLauncher

Assertion failed: IsValid() [File:d:\build++portal+release-live+compile\sync\engine\source\runtime\core\public\Templates/SharedPointer.h] [Line: 851]

EpicGamesLauncher

What to do in this situation?

Can you provide call stack? since this assert fail is too common