63032: We cannot send this message to this user because of a WhatsApp limitation.

This error occurs when you try to send a WhatsApp message to a user whose number is part of an experiment. Twilio can't send the message in that case.

• The destination user's phone number is part of an experiment, so Twilio can't deliver the WhatsApp message.

• Skip sending messages to this user.

• Overview of the WhatsApp Business Platform with Twilio
• The WhatsApp Business Platform with Twilio: Best Practices and FAQs