An error occurred while sharing your deck.

I get this error that isn’t very helpful when trying to share a deck on the ankiweb.com site.

“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.”

I’ve tried rebuilding the db and re-syncing. The deck exports on the desktop version just fine. Any suggestions of what to try next? I’m on V 2.1.54
Thanks
Bob