Blank page

In the Enfold main demo install there is a page called “blank page”, where you can setup a look for a blank page. I assumed this is what people should always see when they open a page that doesn’t exist. However currently if I open a page that doesn’t exist, I get this text:

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Sorry, the post you are looking for is not available. Maybe you want to perform a search?

[Search Window]

For best search results, mind the following suggestions:

Always double check your spelling.
Try similar keywords, for example: tablet instead of laptop.
Try using more than one keyword.
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I don’t like this, I want instead my “blank page” template to appear. How do I configure it so that my blank page template appears in this situation?