That seems odd. We are investigating this issue. Thanks for bringing it up!
Ok I talked with our QE, and we wonder if any of the following are causes for this:
1. Are you on the latest version of 10.10?
2. Can you close Photoshop and reopen it? Does that change anything?
3. Can you confirm that Generator is on? You can check that by going to File > Preferences > Plugins…
If all of these are true, then it might be this issue I encountered,that is a bug we will be fixing soon:
- Do you have your localhost mapped to some other domain?