CTA A/B Testing Variations

Sounds like you have a javascript error caused by another plugin or by your theme.

To check for javascript errors go to the screen you are having the issue with and follow this these steps http://docs.inboundnow.com/guide/debugging-javascript-errors/ and this video:

Report back what you see.

Also post a link and I can have a look.