WhatsApp Error 131045: Phone number registration error

What this means#

The phone number's certificate is incorrect or missing.

Why it happens#

• The number was never registered, or registration failed.

How to resolve it#

Register the phone number before attempting to send messages.

Learn more#

See Meta's official reference for WhatsApp error code 131045.

Still stuck?#

If the error persists after trying the steps above, note the exact error code (131045) and reach out to support with the message details — the code tells us exactly what WhatsApp rejected.