Chatbot don’t respond (A message without a valid session_id was received))

Hello, Currently, I am building a voice assistant with open source Rasa and Mozilla tools. I follow this link: Build an AI voice assistant with Rasa Open Source and Mozilla tools | Rasa. Now, it doesn’t respond to anything. Who can help me!

Hello @phamnhuquan,

How did you get to this point? I am trying everything but I cannot send messages to the voice assistant.

Could you solve this issue?