Not work on wp 3.9.1

Please tell us the theme you are using. Another user had a similar issue with a commercial theme. See this thread:

Version 2.1.4 addresses this issue.

Thanks,

-jf

yes. all happened like on your thread. I use Page Builder. This happened on all theme I try. So, for now I disable your plugin.

Version 2.1.4 fixes the error generated by Page Builder.

thanks
yes, now work fine. Good plugin.