That's an option, but a time consuming work around. I prefer that the app work properly. I've deleted and reinstalled so many times lately trying to fix repeated various seller app problems.
@ShirasGarden: Is the Message you trying to include an image on the first Message of a new thread? If yes, that seems to be an intentional decision by Etsy to reduce spam / scam Messages. You should be able to attach an image on subsequent Messages in that thread.
