My landscape editor doesnt work in the current project but does in a new project

so im trying to add a landscape using the tutorials on digital tutors but the landscape wont show up. once i click on the landscape tab it comes up with a green grid and once i click on create new it comes up with a loading bar, completes it and doesnt show the landscape. I also realised afterwards that my atmosphere stopped working after that. as in it wouldnt show also.
the first is from a new project i did that i only added a landscape too.
the rest are the existing project and it shows what happens
thanks for the help

anybody, got anything, any tips