Glad it is solved now 
You probably did not select the correct template when creating the page. Or your site.php blueprint does not allow the creation of pages with other blueprints than default.
The site.yml file from the starterkit limits subpages to default, you can either remove that setting to allow all blueprints/templates or include a list of all allowed templates.
title: Site
pages: default
fields:
title:
label: Title
type: text
author:
label: Author
type: text
description:
label: Description
type: textarea
keywords:
label: Keywords
type: tags
copyright:
label: Copyright
type: textarea