UE4 Check all Actors in an array for condition

Hey, so the thing is that I am not using any For Each loops. I can select witch system should be part of the array in the detail panel on the right when I select the system because I made the array in the Camerasystem_BP be instance editable. The only way I am setting the array is the picture I showed at the top. The error I get is saying that it cant get anything on the specific index because I haven`t assigned anything in the detail panel in the array on the index slot. Here are some pictures of the detail panel and error.

I hope you can kind of get what I mean.