Whenever I add any of the nodes in Event Graph for my actor component, Unreal Engine crashes.
Other actors are fine tho.
What can be to problem causing this situation?
what is currently in the event graph? (variables, functions, Events) can you maybe show us an image of its current state.
what is in the Hierarchy of the actor? (components)
what does the actor inherit from?
what else is open (including other programs) when this crash happens?
does a crash report appear? a windows message box?
what is in the log about this crash? (in your projects directory) [ProjectName]/Saved/Logs/[ProjectName].Log will be the most recent, look at the bottom 20 or so lines should help you and others help you if needed.
Then engine/Editor is very verbose (often giving information many would find excessive), but crash diagnosis can be situations where that is a good thing.