Unable to select a UI Builder Theme

[fauverism]

I have trouble with changing Themes in UI Builder. Here's what happens...

I click the Create An Experience button from the UI Builder page. Here are my settings.

I open the experience and create a Theme Preview page from the Legacy templates.

When I go to select a Workspace Theme in UI Builder by selecting Menu > Edit Experience Settings > Branding and theming. I would expect to be able to select a Theme and I've done this before. There's a setting somewhere I'm missing. 

An alert I get is Read Only: The page template and Variant are in different application scopes.

If you can point me in the right direction I'd greatly appreciate it. 🤗

[Michael Fry1]

I'm thinking it's just a Cross-Scope privilege issue https://docs.servicenow.com/bundle/utah-application-development/page/build/applications/reference/c_... 

[fauverism]

Hey Michael, thanks for the answer by the environment is Tokyo.

[fauverism · Accepted solution]

Turns out that only Portal or Custom Experiences allow for their own theming. 

[Gabriella Alves]

Hey, what do you mean with custom experience? I'm having the same issue. I created a Workspace using App Engine and Polaris is set as Theme and I can't change