I am trying to cross-list a section into another course, but when I enter the course to cross-list into, I always see the message "Course xxxx not authorized for cross-listing."

I am doing this in our institution's Canvas test server. I am masquerading as the instructor for these courses. These courses are for the fall 2015 term, which hasn't started yet. I have tried it with both courses published and with both courses unpublished. I have tried it by searching for the course name, and by entering the course ID. The result is the same every time.

This is what the message looks like:

Is there a way to find out why the course is not authorized for cross-listing?