Accessed none trying to read property?

I have this error appearing for days, everytime I try to shoot my weapon with a line trace it give me this error but if i remove the line trace it runs fine I searched but nothing seemed to solve my problem.
I’m a complete novice in Unreal and game making in general.

This isn’t assigned


It doesn’t matter, because you can just use GetPlayerCameraManager, and plug it into the world location and vector nodes.

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