Having same problem as others. Trying to share decks, getting this error message even though I’ve only used 4 of my 20 shared deck things:
Failed
An error occurred while sharing your deck. Please click back and try again, and if the problem continues, please post on our support site for assistance.
Tools>Manage Note Types, then select that notetype and click on Cards. If you update to the latest beta version, it will tell you of any problems when you click on Save in the Cards screen.