Mautic Integration with Twilio to send message to Whatsapp

[jpgiron]

@josephsinnaco

        /***** Add Support to WhatsApp *****/
        $prefix = '';
        if($number){
            if(strlen($number)>9){
                if(substr($number, 0, 9) === 'whatsapp:'){
                    $prefix = 'whatsapp:';
                    $number = substr($number, 9);
                }
            }
        }
        /***********************************/

Hello, i made this modification, but give me the same error.

Último error de ejecución: [HTTP 400] Unable to create record: The ‘From’ number whatsapp:+15089805226 is not a valid phone number, shortcode, or alphanumeric sender ID.