If you are seeing this on your publication (please see photos below), your publication probably doesn't meet the minimum print requirements set by our print partner Peecho.
These minimum print requirements include:
A publication should have at least 16 pages and at most 500.
Its aspect ratio (width/height) should be between 0.34 -1.54.
Peecho sets these physical limitations like the number of pages, the size of the pages, the aspect ratio, etc so they can guarantee that your printed publication will be printed at the highest quality. You can read more about the exact requirements on the help section on the Peecho website.