Issue with pre-viewing the app

Hi guys  unfortunately, when I try to pre-view my app I see this page that I have never created and that is not mine. Can someone help me in deleting it ? thank you:) 
1 answers

This is the default Mendix sign-in page that comes out of the box when you turn the security settings on. You can use your own styling for it, or allow anonymous users into your app, and create a custom login page.