This is a free plugin. The purpose of this plugin is to make the extensions by HuntBee to be organized properly and make the opencart directory looks clean. Also, it avoids several unnecessary OCMOD modifications only for making the extensions links appear in the admin menu.
Most of the extensions developed by huntbee will require this plugin.
Download this plugin from https://www.huntbee.com/freebies/base-plugin or from OpenCart Marketplace https://www.opencart.com/index.php?route=marketplace/extension/info&extension_id=41348&filter_member=HuntBee%20Services