This could be an error in the communication between your rasa-production and rabbit containers. You can try the following to test your containers are able to communicate with each other:
From the terminal enter the following to access the rasa_production container:
sudo docker exec -it rasa_rasa-production_1 bash
Then issue this CURL request to Rabbit:
curl http://user:$RABBITMQ_PASSWORD@rasa_rabbit_1:15672/api/healthchecks/node
What is the response?