My nextcloud 2fa mysteriously got turned off
A few months ago, I had 2fa working properly on nextcloud.
More recently than that, when I log in with the password, it tells me I should set up 2fa.
@anarcat points out that if nextcloud accounts are mysteriously having their 2fa state reset, that's weird and worth looking into.
(I raised the issue to him because I tried to use the ios authy app for my nextcloudf 2fa, because it's the top app recommended by gitlab.torproject.org and it works nicely there, but authy looks at nextcloud's 2fa qr code and says "Format not supported".)