Receiving error on Sign Up pages for Classifed & Directory

Running into an error when visitor goes to Sign up for either Directory or Classifieds.

This is an example of the error:
http://www.idaholistic.com/?page_id=16

I disabled all the plugins except for Directory, and still had the error. Same with Classifieds.

I am using the default theme for Directory.

Please provide more help than explaining that it is an incompatible feature. I am limited to only using your products right now on this brand new website, and with nothing else activated - your team ought to be able to help me resolve the issue.

Thanks!