Coursepress shortcodes and link do not work

I have installed Coursepress and most seems to work fine. However, two issues.
1. When I am in a course overview with the date, coursestructure, etc there's a button to enroll for the course. This button brings me to the good URL but the page is empty
2. I want to add a page with instructors and used the shortcode [course_instructors]. The page is empty alltough I have one instructor assigned to 4 courses.

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Thanks for your support.