Upon running the batch process to automatically add location terms to the location_taxonomize vocabulary, I'm receiving this error which is preventing the batch process from working:

An AJAX HTTP error occurred. HTTP Result Code: 200 Debugging information follows. Path: /batch?id=176&op=do StatusText: OK ResponseText: Fatal error: Class name must be a valid object or a string in /../drupal/includes/common.inc on line 7749

Is this a bug with location_taxonomize as I've gotten the batch process to work before, but I sporadically receive these AJAX errors. OR is this an issue with another module causing AJAX errors as I get them occasionally in other areas like Views administration.

I am also using the better_batch module.