Using on iPhone with iOS 15.7.6 with TestFlight. Prompted to create an account or log in to existing account. Chose the latter. Keyed in my server (https://lemmy.world), next keyed in my u/n, and then my password. Reported error: ‘email_not_verified’. Unable to log in.

UPDATE: Thanks to @gkd@lemmy.ml (memmy dev) and @ruud (lemmy.world admin), now able to sign in. Ruud reported that curiously my email had not been verified when I signed up and created an account on lemmy.world.