You have to add the zone number everytime you use the overlay shifts commands:
If animations aren’t working, try refreshing the page or restarting the app
You’d have to use layers and place the character at a lower layer than the overlay so they will be behind it.
1- HOW TO: Move Characters / Overlays to the Layers
2- DARA’S GUIDE: Overlays
The error message you are getting is because you cannot have a dialogue that is all CAPS. You need to have a period or exclamation point (or any other ending puncuation), otherwise the script thinks the dialogue in all caps is a character name.
Can you show me what you have in your script?
Always make sure that else is always by itself