Cannot use UI

[tiger990111]

Dear,
Thank you for your great job. I am now finishing track.py and got a json file of result. However when I run server.py to visualize the result, it turns out to be ""GET /data/scipy.data HTTP/1.1" 404 -". And the google-chrome ui just tells me to "Please Wait" without any changing.

[tiger990111]

now I download scipy.data and put it in the proper directory. There's no more 404 anymore, but the UI still tells me to "Please Wait" without any changing.