Any third-party app requires that your WhatsApp number is linked to Business Manager. Luckily, you can do this in just several steps.
1. Open Meta Business Settings.
2. Go to Accounts ➜ WhatsApp accounts.
3. Сlick on + Add on the top right.
4. Choose Link a WhatsApp Business Account.
5. Add your WhatsApp business number.
6. You’ll get a code to your WhatsApp business app, enter it to complete linking accounts.
Done. You can now connect your own WhatsApp number to Chatfuel.