“这项行动无法完成。简单地将图像发送到icloud时，不允许操作“错误

Im simply trying to upload this image to iCloud. It keeps giving me the error "The operation couldn’t be completed. Operation not permitted". I took this code right out of the Document Based App Programming Guide and I believe I've set all my certificates, identifiers, profiles, and entitlements correctly. Any help would be much appreciated. This is insanely frustrating. Im simply trying to upload this image to iCloud