You need to add at least one account so you can go into the main menu. If the issue is on startup, then can try and re-install the app. If need be, on github there are older versions. Try one of those.
Hello, I’m having the same sync issue with an email address hosted at https://www.o2switch.fr/.
I went to preferences, reconnected the account, and the same error pops up.
What should I do ?
Closing: the “no e-mail address associated with this account” error when adding Outlook / Hotmail accounts is fixed in 1.22.0 — Mailspring now falls back to the address in the OAuth id_token when Microsoft’s /me endpoint doesn’t return one. If you’re on 1.22 or later and still hit this, please open a new topic. (The Gmail login error in the last post is unrelated — please start a separate thread with the exact error text.)