My Backgrounds and Overlays Aren't Showing Up On The Writer's Portal!

I need help. Episode 7 of my story is complete, but every time I try to preview my approved backgrounds and overlays, I keep getting errors, even though I don’t have any in my script.
Does anyone have advice for me?

Does the error message say “create overlay in stage view first”? This means you’re animating an overlay that you haven’t added to the scene (either the create command or adding it with the background name) or the overlay is misspelled in one of the commands.

Yeah. I think it is. Do I need to go back and fix it? Because I’ll go ahead and do that.