Could not load authenticator setup — try again
During mandatory 2FA login, the browser tried POST /api/auth/mandatory-2fa/setup and hit a network/parse failure (catch path). Product text: could not load authenticator setup — try again.
Why this happens
Unlike Could not start authenticator setup — sign in again (API returned an error body), this path means the fetch itself failed — offline, aborted, bad JSON, or a transient outage. The pending mandatory-setup cookie may still be present.
Diagnose and fix
1. Refresh and complete password login again so the mandatory-setup cookie is reissued.
2. Check Network for /api/auth/mandatory-2fa/setup and /api/auth/csrf.
3. Admin: confirm Two-factor authentication mode is mandatory/allowed as intended.
4. If the account is stuck mid-setup, staff can Reset user 2FA / sessions.