CoursePressPro not saving units or let me edit content

Hi there, I am trying to use CoursePress and when I try to create a unit: fill in the title and clic save, it just disappears. And the edit unit part is always in "Loading units elements". How can I solve this?

I would like to know also, how to change the template for the course? I dont want to have the sidebar and the menu within the course, how can I do that?