Chatbot Recast - Channels

Hello everyone,

I want to connect my chatbot to my messenger page and I followed the steps described by Recast in the "Connect" tab for "Messenger" until the last step successfully.

Now, I wonder if after finishing this, what do I miss? (Because messaging doesn't work)

Is it necessary to change from "disabled" to "enabled"?

And in this case, what is a "Valid Privacy Policy URL" and how do I get it?

Thank you.