I tried to delete my account email@example.com on Ankiweb, but it stopped while still deleting media.
Then I added the account again to Anki on the Mac. I thought, maybe it helps, to get the media files first deleted there.
But if I try to synchronize, it says, that I only can synchronize one account at a time, although none of my other accounts is syncing.
How get I rid of firstname.lastname@example.org?