Alexa keeps returning error when attempting to read my feed from facebook

So I'm in the process of developing an app for Alexa which reads from all different social media feeds. to start with I've begun developing purely for facebook. However after following all the steps as provided by

http://matchboxmobile.com/blog/oauth-using-alexa/

The Lamba Response speaks below.

"<speak> There was a problem getting the correct token for this skill, Please try again later. </speak>"

For those from amazon the skillid is amzn1.ask.skill.f2a6c88f-c2e6-4a5d-8449-c3004b374f27

Lambda Request:

{
  "session": {
    "sessionId": "SessionId.87d84d42-eee7-4668-8914-e697167786d0",
    "application": {
      "applicationId": [APP ID went here as a string]
    },
    "attributes": {},
    "user": {
      "userId": [USER ID went here as a string]
    },
    "new": true
  },
  "request": {
    "type": "IntentRequest",
    "requestId": "EdwRequestId.e47470d4-6e0e-41f8-b59b-9702c1a3191e",
    "locale": "en-US",
    "timestamp": "2016-12-30T21:09:35Z",
    "intent": {
      "name": "readFeedIntent",
      "slots": {}
    }
  },
  "version": "1.0"
}

Lambda Response:

{
  "version": "1.0",
  "response": {
    "outputSpeech": {
      "type": "SSML",
      "ssml": "<speak> There was a problem getting the correct token for this skill, Please try again later. </speak>"
    },
    "shouldEndSession": true
  },
  "sessionAttributes": {}
}

What could I be doing wrong that causes me to receive this error?

Thanks,

Nirosan