error output when running shop and buy commands

[jamesneimanconsulting]

note that when I run shop and buy commands from the demo app's website, the python server generates the following error output.
errors from server:
IOError: [Errno 32] Broken pipe
127.0.0.1 - - [03/Oct/2018 14:40:16] "GET /favicon.ico HTTP/1.1" 404 -
ERROR 2018-10-03 14:40:20,254 ..../python-sdk-demo-app-master/my_project/lib/python2.7/site-packages/optimizely/optimizely.py:63:Provided "datafile" is in an invalid format.
ERROR 2018-10-03 14:40:20,255 ..../python-sdk-demo-app-master/my_project/lib/python2.7/site-packages/optimizely/optimizely.py:170:Datafile has invalid format. Failing "activate".
127.0.0.1 - - [03/Oct/2018 14:40:20] "POST /shop HTTP/1.1" 200 -
INFO 2018-10-03 14:40:20,257 127.0.0.1 - - [03/Oct/2018 14:40:20] "POST /shop HTTP/1.1" 200 -
ERROR 2018-10-03 14:40:22,373 ..../python-sdk-demo-app-master/my_project/lib/python2.7/site-packages/optimizely/optimizely.py:206:Datafile has invalid format. Failing "track".
127.0.0.1 - - [03/Oct/2018 14:40:22] "POST /buy HTTP/1.1" 200 -
INFO 2018-10-03 14:40:22,381 127.0.0.1 - - [03/Oct/2018 14:40:22] "POST /buy HTTP/1.1" 200 -
127.0.0.1 - - [03/Oct/2018 14:40:26] "GET / HTTP/1.1" 200 -
INFO 2018-10-03 14:40:26,344 127.0.0.1 - - [03/Oct/2018 14:40:26] "GET / HTTP/1.1" 200 -
ERROR 2018-10-03 14:40:29,194 ..../python-sdk-demo-app-master/my_project/lib/python2.7/site-packages/optimizely/optimizely.py:170:Datafile has invalid format. Failing "activate".
127.0.0.1 - - [03/Oct/2018 14:40:29] "POST /shop HTTP/1.1" 200 -
INFO 2018-10-03 14:40:29,196 127.0.0.1 - - [03/Oct/2018 14:40:29] "POST /shop HTTP/1.1" 200 -
ERROR 2018-10-03 14:41:03,593 ..../python-sdk-demo-app-master/my_project/lib/python2.7/site-packages/optimizely/optimizely.py:170:Datafile has invalid format. Failing "activate".