I have cloned and deployed the Python App Engine Demo for the AdWords API (from here)
After going through the tutorial multiple time to understand how to retrieve the refresh token I get the following error from the online app:

Error: ('Connection broken: IncompleteRead(299 bytes read)', IncompleteRead(299 bytes read))

I don't think it has something to do with the credentials I have provided (otherwise I would expect a more verbose error)

What am I missing?
I have a feeling it has to do with the App Engine Environment

The application was deployed to the following link (not the flex environment):
https://adwordsimos.appspot.com

Any help would be appreciated

Thanks

Gilad