Found a solution. It looks like the app is using an old URL that does not exist anymore. You can vi the config file to fix it:

vi /opt/barriosquare/barrioConfig.py
Change
AUTHORIZATION_EXCHANGE_URL = 'http://api.playfoursquare.com/v1/authexchange'
To
AUTHORIZATION_EXCHANGE_URL = 'http://api.foursquare.com/v1/authexchange'

Also I noticed that if you do not have a custom profile pic the login screen hangs because "http://foursquare.com/userpix/blank_boy.png" is not a valid URL.