Error 63016
Product: Programmable SMS
ERROR - 63016
Failed to send freeform message because you are outside the allowed window. If you are using WhatsApp, please use a Message Template.
Possible Causes
- This message failed to be delivered to the user because it was sent outside the messaging channel's allowed conversation window. For WhatsApp messages initiated by the business, you must use a pre-defined template.
- For Facebook Messenger messages initiated by the business, only publishers registered with the Facebook News Page Index (NPI) are allowed to send notification messages outside the 24-hour window.
Possible Solutions
- Send a WhatsApp message using a template
- If you are a publisher, register your Facebook Page with the Facebook News Page Index