confirmation message not showing up

I activated Jetpack 3.3.2 and added the form to my footer widget but I don’t get confirmation message after the submit button is clicked.

Here is the shortcode of the form:
[contact-form subject='test from wp site']
[contact-field label='Name' type='name' required='1'/][contact-field label='Email' type='email' required='1'/][contact-field label='Website' type='url'/][contact-field label='Message' type='textarea' required='1'/]
[/contact-form]

https://www.ads-software.com/plugins/jetpack/