flask-restplus-server-example: ../Scripts/invoke No Such File or Directory

Hi, I have cloned the repository and trying to run the project. I am using command invoke app.run. All dependencies are installing successfully. Migrations are running good. I have checked the db and all tables are created. However i am getting error: C:\Users\Administrator\AppData\Local\Programs\Python\Python35\Scripts\invoke [Errorno 2] No Such File or Directory. I have checked that invoke.py is present in above mentioned path. Any workaround for this problem? I am running it on windows 7 64 bit with python 3.5.2