Verify that the page configuration is in place as expected. Remember that your Designer is showing you a View, and if you want to see that View on a Page, you need to do one of two things:
- Attach the View as the Primary View in the Page Configuration panel
- Navigate to the View in question
(or you could embed the view using any of the Embedding components)
If the View in question is meant to be the Primary View for the Page, double-check that the URL your browser is on matches the URL supplied in the Page Configuration entry for your page.