Error during term relationship copy causes clone failure

Hi There,
I appreciate any insight or suggestions you can offer.
I am using the Cloner Plugin (https://premium.wpmudev.org/project/cloner/), and WPversion is 4.1.1.

I am cloning from the primary or main site to an existing blog. I have a sub-domain install.

My error Log shows this error:
PHP Fatal error: Call to undefined method Site_Copier_Terms::_remove_object_terms() in /nas/wp/www/*****/revdev/wp-content/plugins/cloner/copier/class.copier-terms.php on line 466

I consistently get 202 entries in the new terms_relationship table before it stops.

I have tried cloning into a new site now and receive the same error.