Technical Issue

I’ve received an email to say that our staging site is receiving a technical issue as a result of this plugin. Below is an outline of the error listed in the email.

Error Details
=============
An error of type E_ERROR was caused in line 660 of the file D:\Data\Web\abbott-group.new\staging\wp-content\plugins\woo-advanced-shipment-tracking\includes\class-wc-advanced-shipment-tracking-install.php. Error message: Uncaught Error: Call to undefined method WC_Advanced_Shipment_Tracking_Install::get_tracking_items() in D:\Data\Web\abbott-group.new\staging\wp-content\plugins\woo-advanced-shipment-tracking\includes\class-wc-advanced-shipment-tracking-install.php:660
Stack trace:
#0 D:\Data\Web\abbott-group.new\staging\wp-includes\class-wp-hook.php(286): WC_Advanced_Shipment_Tracking_Install->update_database_check(”)
#1 D:\Data\Web\abbott-group.new\staging\wp-includes\class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 D:\Data\Web\abbott-group.new\staging\wp-includes\plugin.php(465): WP_Hook->do_action(Array)
#3 D:\Data\Web\abbott-group.new\staging\wp-settings.php(525): do_action(‘init’)
#4 D:\Data\Web\abbott-group.new\staging\wp-config.php(101): require_once(‘D:\\Data\\Web\\abb…’)
#5 D:\Data\Web\abbott-group.new\staging\wp-load.php(37): require_once(‘D:\\Data\\Web\\abb…’)
#6 D:\Data\Web\abbott-group.new\staging\wp-admin\admin-ajax.php(22): require_once(‘D:\\Data\\Web\\abb…’)
#7 {main}
thrown