How are you setting values of those actor references? Creating a variable does little. It’s like creating a string and forgetting to type text. Sure you have a string but it says nothing.
We can’t see the process above and access none simply means that the instance of object you’re pointing at does not exist.
How does the engine know what you mean by Platform1 - you may have 0 or 1000 platforms. The variable is not pointing at anything.