We installed WPBook and set up a facebook app like shown on http://wpbook.net/docs/install/basic-install/
I think I set up everything just like explained, but trying to open the canvaspage http://apps.facebook.com/319872171403936
or checking the permissions facebook tries to load the URL https://www.facebook.com/dialog/oauth?client_id=319872171403936&redirect_uri=https%3A%2F%2Fapps.facebook.com%2F319872171403936%2F
and returns an error without further information.
Can anybody help me?