I have created a new page type which works fine on our development server, but when I deploy it on the production server it doesn't work so good. If a page is created using the page type and viewed, the login screen shows up every time (even though I'm already logged in and using edit mode). Thus, the page cannot be viewed. What causes the login screen to appear? I know that it shows up if something on the page is not published, but that shouldn't happen in edit mode, right? Could it be an error that occurs in the page loading (eg., I missed something when deploying)? How can I find the error? I get no error message, just the login screen.