incompatible with WooCommerce Extra Product Options

This plugin, when combined with the third party Woocommerce plugin, “WooCommerce Extra Product Options” by themecomplete, causes my website to crash (500 Error). If MainWP Child or this WC plugin are removed, the site works fine. I have MANY other Woocommerce plugins installed, but this is the only one behaving different. If desired, a temporary admin login can be provided (privately).