How to solve MalformedResponse 'final_response' must be set. error in action simulator

Question

Hi, When I try to test my Test app, it gets stopped and display

My test app isn't responding right now. Try again soon

.

When I check validation error tab I notice I got this error

MalformedResponse
'final_response' must be set.

here is the Debug info:

<code>
{
  "audioResponse": "//NExAAQMQ...",
  "conversationToken": "GidzaW11bG...",
  "debugInfo": {
    "agentToAssistantDebug": {
      "agentToAssistantJson": "{}"
    },
    "assistantToAgentDebug": {
      "assistantToAgentJson": "{\"user\":{\"userId\":\"ABwppHG7Kyq6lQuC4UQhVkNFxGJ3HlCPVLe03G5Jo9UUsXcg41z8LL0ppX3pIv36nDLcvJD8YNxQexCrqoywTg\",\"locale\":\"en-US\",\"lastSeen\":\"2018-02-09T08:05:38Z\",\"userStorage\":\"{\\\"data\\\":{}}\"},\"conversation\":{\"conversationId\":\"1518164534381\",\"type\":\"NEW\"},\"inputs\":[{\"intent\":\"actions.intent.MAIN\",\"rawInputs\":[{\"inputType\":\"KEYBOARD\",\"query\":\"Talk to my test app\"}]}],\"surface\":{\"capabilities\":[{\"name\":\"actions.capability.SCREEN_OUTPUT\"},{\"name\":\"actions.capability.AUDIO_OUTPUT\"},{\"name\":\"actions.capability.WEB_BROWSER\"},{\"name\":\"actions.capability.MEDIA_RESPONSE_AUDIO\"}]},\"isInSandbox\":true,\"availableSurfaces\":[{\"capabilities\":[{\"name\":\"actions.capability.SCREEN_OUTPUT\"},{\"name\":\"actions.capability.AUDIO_OUTPUT\"}]}]}",
      "curlCommand": "curl -v 'https://api.api.ai/api/integrations/google?token=e4092e2db85b4744be7d736861988a51' -H 'Content-Type: application/json;charset=UTF-8' -H 'Google-Actions-API-Version: 2' -H 'Authorization: eyJhbGciOiJSUzI1NiIsImtpZCI6ImJhNGRlZDdmNWE5MjQyOWYyMzM1NjFhMzZmZjYxM2VkMzg3NjJjM2QifQ.eyJhdWQiOiJyZXN0YXVyYW50LTRhYzMzIiwiYXpwIjoiMzk3NjQzMDYwNTkyLWlydW9ubHFzZ2cyZm81cnM1OXIwcGpkYTBxMjVsZjZsLmFwcHMuZ29vZ2xldXNlcmNvbnRlbnQuY29tIiwiZXhwIjoxNTE4MTY0NjU0LCJpc3MiOiJodHRwczovL2FjY291bnRzLmdvb2dsZS5jb20iLCJqdGkiOiI0NzVhMDU5OTllMzc4ODA0MmE5YTlhYjFkZmQ0YWU0MzA2Y2MzNTA3IiwiaWF0IjoxNTE4MTY0NTM0LCJuYmYiOjE1MTgxNjQyMzR9.GZ3NrlfYPAx5egtOYDktY9W-6P776_eLsth7tvyK-q7vytHdbMOcL4Pkq27g4pcWL8VRJkPv_3VL-QA2uAPaVm1m0F2H3qfYHqQtZmBgxgICSiwKCpyUnV1KkQWlD5O6MRW1VVZFXMqk2n2_w1U_8MCXH3z1nIB_G9MHLUD3mTomvM1W_SoyIx6xhvDJKVHN42pu28Ahj_BJEilazK6q91OhtY3hbcGjB5xAYnVP6Soh_N4qSvlrPV3J5-L8pKu0sArlspukGLKb_ijNKZiEgxsire2WCs85-5GbB-mKPXGnOuPY7mE168b2Xw37us-5V0sZ1y7Qtod7nH85A1kHaA'  -A 'Mozilla/5.0 (compatible; Google-Cloud-Functions/2.1; +http://www.google.com/bot.html)' -X POST -d '{\"user\":{\"userId\":\"ABwppHG7Kyq6lQuC4UQhVkNFxGJ3HlCPVLe03G5Jo9UUsXcg41z8LL0ppX3pIv36nDLcvJD8YNxQexCrqoywTg\",\"locale\":\"en-US\",\"lastSeen\":\"2018-02-09T08:05:38Z\",\"userStorage\":\"{\\\"data\\\":{}}\"},\"conversation\":{\"conversationId\":\"1518164534381\",\"type\":\"NEW\"},\"inputs\":[{\"intent\":\"actions.intent.MAIN\",\"rawInputs\":[{\"inputType\":\"KEYBOARD\",\"query\":\"Talk to my test app\"}]}],\"surface\":{\"capabilities\":[{\"name\":\"actions.capability.SCREEN_OUTPUT\"},{\"name\":\"actions.capability.AUDIO_OUTPUT\"},{\"name\":\"actions.capability.WEB_BROWSER\"},{\"name\":\"actions.capability.MEDIA_RESPONSE_AUDIO\"}]},\"isInSandbox\":true,\"availableSurfaces\":[{\"capabilities\":[{\"name\":\"actions.capability.SCREEN_OUTPUT\"},{\"name\":\"actions.capability.AUDIO_OUTPUT\"}]}]}'"
    },
    "sharedDebugInfo": [
      {
        "name": "ResponseValidation",
        "subDebugEntry": [
          {
            "debugInfo": "'final_response' must be set.",
            "name": "MalformedResponse"
          }
        ]
      }
    ]
  },
  "response": "My test app isn't responding right now. Try again soon.",
  "visualResponse": {
    "visualElements": []
  }
}
</code>

Answer 1

There could be a silly mistake like I did.

In Your index.js file, Check out this similar line:

app.intent('favourite color', (conv, {color}) => {
    const luckyNumber = color.length;

In this, be sure that your intent name is exactly same as your intent that you created while creating a new intent.

NOTE: Intent name is CASE-SENSITIVE. So make sure you type the same name exactly in this line of .js file.

Answer 2

I had same issue, resolved following way

1. go to logs of firebase function in my case url was
   https://console.firebase.google.com/project/project-1/functions/logs?search=&severity=DEBUG
2. Refresh action simulator window and Check error log while executing
3. In my case error was

4. I have added Intent handler in firebase function as below

   app.intent('Default Welcome Intent', conv => { conv.ask('Hi, I am in welcom intent.') })

5. Refresh simulator window, and I got the proper response.

Similarly you can also find the cause of the error and resolve it.