Scanning the QR code does not by itself enable two-factor authentication. Setup is complete only after Institution accepts a six-digit code and confirms that the authenticator is enabled.
If you closed the dialog, open Settings, then Security, and check the current status. If it says Not enabled, choose Set up authenticator app again. Use the QR code or manual key from this new attempt, then verify its code.
Your authenticator may still contain an entry from the interrupted attempt. Give attention to which entry you are using; the old entry can continue generating numbers without being the factor currently enrolled in Institution. Do not repeatedly submit its codes if they are being rejected.
Wait for Two-factor authentication enabled and the Enabled badge before ending the session. If setup reports an error while preparing the authenticator, retry after checking the connection. Send support the visible error without a screenshot of the QR code or key. Keep access to the verified authenticator when moving to another device.
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