I am using the current Ripple UI (v0.9.15) and experienced this issue too.
For me the issue was caused by not having the config file in the right location. After I put it in the correct location, Ripple did not recognize it until I disabled/re-enabled Ripple.
What worked for me was:
- Make sure config.xml is in the www root with index.html (where you currently have it)
- Click on the green Ripple icon in the top left and disable Ripple for that page
- Re-enable Ripple