I have created one learning-course in adapt-authoring tool. After downloading it I am serving it statically via nginx server. But on launch of the course I am not able to post statements in LRS.

I have included/configured adapt-tkhub-xAPI and  adapt-trackingHubextension too. Following is configuration of both extensions

• adapt-trakingHub

"_trackingHub": {
    "_browserChannel": {
      "_ignoreEvents": [],
      "_isLaunchManager": true,
      "_isStateStore": false,
      "_isStateSource": false,
      "_tracksState": true,
      "_reportsEvents": true,
      "_isEnabled": true
    },
    "_identifyById": true,
    "_courseID": "https://xxx.xxx.com/course/g/4/g4xpfhPTb8VR8xvNzMJX2D2m3pI404yH0zRJ1eLbeatkE2GefcoSPReeUnKDlp4O/#/",
    "_isEnabled": true
  },

• adapt-tkhub-xAPI

"_tkhub-xAPI": {
    "_channels": [
      {
        "_generateIds": true,
        "_password": "",
        "_userName": "",
        "_endPoint": "",
        "_fullName": "",
        "_mbox": "",
        "_homePage": "",
        "_isFakeLRS": false,
        "_xapiLaunchMethod": "adlxapi",
        "_ignoreEvents": [],
        "_isMobile": false,
        "_isCachedLocally": false,
        "_isLaunchManager": true,
        "_isStateStore": true,
        "_isStateSource": true,
        "_tracksState": true,
        "_reportsEvents": true,
        "_isEnabled": true,
        "_name": "xapiLaunch"
      }
    ],
    "_isEnabled": true
  },

While launching course it displays following alert

 ERROR: could not get xAPI data from xAPI-launch server!. Tracking on this channel will NOT work!

How can I integrate xAPI-launch server in it? Is it mandatory to use xAPI-launch server?