Email option not working

My daughter is enjoying this app, but the email option is not working well. She is able to email "blocks" and "mobs" in order to print them, but "characters" often dont email successfully. Sometimes the image arrives intact and ready to print but very often the image is corrupted and cant be opened or printed. The email option isnt offered at all for "items" for some reason. Does anybody have advice?

Studying dug about Minecraft: Papercraft Studio