So I’am following a tutorial and i got stuck here, in spawn actor from class it gives him a color input but when i do it’s not has anyone ran into this problem? On mine it gives me a “owner” input but on his it gives him a color input.
It’s “Expose on Spawn”, you can set variable to be settable on spawn, click the variable and then click “Expose on Spawn”. Tutorial you linked even mentions that at 5:50
If you do that make sure you compile blueprint (projectile one) so reflection system will be up to date and see exposded property, if you still don’t see it, change class on node and set it back, or place new spawn node
Omg… really? dude you rock. I could not see what i missed and but i fixed it. you are awesome.
I wish I had learned what Expose on Spawn does a long time ago 
If that fixed your problem, please Mark 's answer as Accepted to help others on AnswerHub find the solution when they have the same problem.
To tell i also learn about it too recently ;p i even remember answering my one of similar question in the past that it not possible because i didn’t know about it. There C++ specifier for it too. I think they added it in some of the updates