error during registration

Joomla 3.3.6
Community Builder 1.9.1
CBSubs 3.0.0

I upgraded my site from Joomla 2.5 to 3.3.6. I reinstalled certain extensions including Community Builder.

However, when I visit the registration page at slcclerk.com/main5/register and sign up for the Free access plan, fill in the fields and press submit, it goes to blank screen that says "[an error occurred while processing this directive]"

I have turned on debugging and I still see no further information. I have turned off many questionable plugins, retaining only the major extensions that I did reinstall after upgrading. Mijoshop, RSForms, ActiveHelper, Shape5 template, Akeeba Backup, and Admin Tools.

Has anyone had this problem before? What could it be?

"This webpage is not available" your URL doesn't appear valid. Please enable debug mode and maximum error reporting in Joomla global configuration (both must be set). Then attempt to register. If issue persists then disable SEF entirely and retry. If issue still persists then disable non-core CB plugins within CB > Plugin Management 1 by 1 to see if issue goes away.