When start play in viewport, play stops (crashes)

Hello guys!

I have a big issue with my game…
I am making an endless runner, I use “Tick Event” to keep runner the character, but, when I am at the tile two (room) the game stops (crushes)
Can someone knows a better way to make this move?

You have described the issue. Now describe the error given and the blueprint code that the engine is having an issue with.