unreal crashed now bullets are invisible

So my unreal engine crashed the other day and for some reason when it did it broke the first person character. The crosshair is gone and my bullets still work but are now invisible. I have checked the visibility and that’s all ticked. I don’t know what to do to get it back.

Can you check if the needed assets like textures or meshes are still linked / selected in your blueprints / widgets? E.g. FirstPersonProjectileMesh in BP_FirstPersonProjectile as the mesh for the Sphere?