Why my Facebook Chat widget doesn't work
If you're having trouble opening your Facebook Chat widget, make sure you can access Facebook Messenger.
Our widget is an interface that links your website to Facebook. When you click Start Chat, it takes you to Facebook Messenger on your phone or computer, and the chat happens there.
Therefore, your visitors also need to have access to Facebook Messenger to send you messages using the widget.
If you are looking for step-by-step instructions on how to set up your Facebook Chat widget, take a look at this article - Getting Started with Facebook Chat.