I'm not sure what might've gone wrong, unfortunately I don't have much experience in editing for print. For me it printed without any issue, but I have uploaded a version with the pages converted into images (the pages_as_images file). It might not be the most elegant solution, but I think it should work now, haha! I've also uploaded updated versions of the main files, where I've rearranged the layers in the project file, as I suspect that might've had a part in the printing issue. Sorry for the inconvenience!