UE4 crashes in second play

I’m working on a project and I have this Button in my ‘Menu Widget’ that takes you into a new level (I’m using Open Level Node here). When I click it for the first time, It works fine. But if I Quit or Come Back to Menu and click that button (Open Level) the second time, UE4 crashes! It was working fine before and suddenly this is happening. I have not done any major changes to the project so I’m wondering what’s causing it to crash.