Which version of C3 were you using?
The update was a change specific for r389, if you were using an earlier version, it would not work.
Today, I just added a new release 1.819 which is backwards compatible.
If you see an error, report:
- C3 version used
- Platform (mac/win/mobile)
- Errors seen on devtools console:
developer.chrome.com/docs/devtools/open