CB Connect registration problems

You should not use the CB Facebook connection option if you're using JFBConnect. There should only be one extension managing social network authentication on your site. Using two will only cause conflicts, though I don't think that's the issue you're having here.

I'm not sure what data isn't being imported properly, but the way to test and investigate further is to:
* Mark *all* profile fields in CB as *not* required
* In the JFBConnect -> Profiles area, remove the mappings of all fields from Facebook (or other social networks that you want to test) into CB
With that, JFBConnect should be creating the most simple user in CB with just the most basic information.

If that works, start adding new fields to the JFBConnect Profiles mapping area, one at a time, and see if there's any specific field that causes issues.
Then, finally, if that works, start setting whichever fields in CB to required that need to be that way.

With that, we'll be able to eliminate a specific field or determine if the whole creation process at it's most basic level is what's going wrong.

Finally, at the top, you mention you're using Joomla 3.03+CB 2.03+JFBC 6 . Can you let me know if you're really on Joomla 3.0.3? I'm assuming/hoping that was a typo, but please let me know the specific J! version you're using.

Thanks,
Alex

Then it sounds like a PHP error or something else that's causing the problem. I have no idea what error it would be as this isn't something we've heard of before. There's two more things to try:
* Try setting the Error Reporting option to "Maximum" in the Joomla -> Global Configuration area. Hopefully, that will display a message on the front-end of your site.
* If not, leave that setting enabled, reproduce the error, and check your PHP Error Logs (not nginx logs).

Somewhere, something is obviously having issues, but we haven't heard of this before at all and I'm not sure what would be causing problems. If an error is produced above, it will help narrow things down.

Beyond that, we can try to login to the admin area, but the things you've tried are the same things we would try. It's basically a process of elimination (required fields, etc) and error messages to locate the problem from here. Unfortunately, there's no way for us to access the logs we'd need from your admin area.

Thanks,
Alex