I started a new new app with actions on google and when I run the simulator I'm receiving this message "My Test App isn't responding right now. Try again soon".
I am using firebase to deploy my fulfilment which looks like this
const functions = require("firebase-functions");
const App = require("actions-on-google").DialogflowApp;
const firebase = require("firebase");
const firebaseAdmin = require("firebase-admin");
firebaseAdmin.initializeApp(functions.config().firebase);
exports.cabDemo = functions.https.onRequest((request, response) => {
  const app = new App({ request, response });
  const BOOK_TAXI = "book.taxi";
  debugger;
  function bookTaxi(app) {
    app.ask("Currently looking for taxis now. Anything else?");
  }
  const actionMap = new Map();    
  actionMap.set(BOOK_TAXI, bookTaxi);
  app.handleRequest(actionMap);
});
I have tested this and it deployed correctly yesterday and when I tried to run it this morning it gave me that not responding message. It still deploys correctly but I cannot test it on the simulator.
I have the actions on google project and api.ai projects linked properly so I don't think this is the problem. But I could easily be wrong.
The response from the web simulator is
{
  "audioResponse": "//NExAARsE...",
  "conversationToken": "GidzaW11bG...",
  "response": "Cabforce demo isn't responding right now. Try again soon.",
  "visualResponse": {
    "visualElements": []
  }
}
and the DEBUG message is:
{
  "agentToAssistantDebug": {},
  "assistantToAgentDebug": {}
}
This is a duplicate of another question on Stack Overflow => here
There was no solution so I had to repost the question.
I'm receiving the same response and debug message.
All help would be great, thanks !