The OTP isn't arriving. Check your spam folder, confirm the email or number you entered is the one on the account, then tap Resend. Codes can take up to a minute.
The code is rejected. Codes expire after a few minutes — request a fresh one rather than reusing an old message.
Still stuck. Contact support from this screen. Tell us the email or phone number on the account; do not send us your password or an OTP code — support will never ask for either.