You gave me an answer: https://premium.wpmudev.org/forums/topic/after-updating-coursepress-pro-to-latest-version-i-cant-create-more-courses-im-told-to-upgrade#post-742910 - than you - I cant figure out how to respond. Nice tip with the plugi for snapshot.
I have installed from the WPMU dashboard.
Now I have removed CoursePress Pro - and installed again but still same situation. Here you can see what it looks like: