[Forums] Outsystems UI model not defined

Hello,
I am trying to create a custom layout in reactive application.
I used this layout and created a basic form screen with input fields and dropdowns.
Now when I try to load this page it gives out JavaScript error saying OUtsystemsUI model not defined.
I am attaching a Screenshot of my layout created, can anyone please guide me in what am I missing in this.

Thanks, in advance,
Anagha