When I am trying to run python goServer.py in the interface/server/ directory and trying to upload a .sgf file, the url change from/go.html to /go.html?file=Can't create file to write, do you have permission to write?, and nothing else have happened.

This error shows that it must be something wrong with the file permission. Please Solve it，thanks！

goServer.py is a work in progress - it doesn't do anything very exciting yet. We'll make sure to put together clear specs for it tomorrow.