@ Sherry
It was working before because on previous versions I was loading the CSS files incorrectly or more accurately, incorrectly for WordPress 3.3 and newer. Not to get too technical, but the on the older versions of WordPress you hooked into an action named wp_print_scripts to load CSS files. On newer versions of WordPress, the proper action is wp_enqueue_scripts.
For some reason wp_enqueue_scripts action is not being run on your site and I believe that might have to do with the theme, but honestly I can not be absolutely certain. What I do know is that when I changed the action name to wp_print_scripts , it worked, and that was the only change I made. I suspect you might run into this with other plugins.
I think most errors were being created by the Builder framework. If it is actively supported, report the errors, I’m sure they’ll correct them as most are minor, but it could be anyone of those minor errors causing the issue.
Connections should work fine with any properly coded theme, so I can really recommend any in particular. Most issues are simple CSS conflicts or the theme loading an older version of jQuery rather than the version bundled with WordPress.
Hope that helps.
