Devpi web shows a 502 bad gateway

Hi, I've followed the installation procedure exactly as mentioned in the documentation 1. Installed devpi-server and devpi-web 2. Installed supervisor and nginx 3. Generated config files 4. Copied nginx and supervisord conf files to appropriate locations 5. Started nginx and supervisor The devpi-web shows up properly but when I browse through to root/pypi, the page shows up an error "An error has occurred: 502 Bad Gateway URL u'https://pypi.python.org/simple/' returned -1. When I run the devpi-server with the same command line as in supervisor conf file along with --host 0.0.0.0, the error does not show up. Any idea how to fix this? Regards, Radha.