Expo SDK setup not working

Please provide the following:

  1. SDK Version:1.4.0
  2. Platforms(Android/iOS/web/all):Android
  3. Add the appropriate “Tag” based on what Expo library you have a question on.

I am trying to set up expo SDK as defined here (expo/CONTRIBUTING.md at master · expo/expo · GitHub) but it is not working as expected. Following are the errors when I execute the “yarn android” command in step 5. Can someone please help me. All other steps were executed successfully.