Fatal errors caused by cloner plugin

Hi There,
I'm getting the following errors from Cloner when I create a new site, one of the issues it's causing is that I can't seem to save options when I go to wp-admin/options.php - when I click save, the option reverts back to it's original value. There are a few other bugs, but i'm not sure if they're related.

Here are the errors from my debug file:

[16-Jan-2017 15:05:57 UTC] PHP Notice:  Undefined variable: additional_tables in /usr/share/nginx/skizzar/wp-content/plugins/cloner/admin/cloner-admin-clone-site.php on line 429
[16-Jan-2017 15:05:57 UTC] WordPress database error Table 'skizzar_db.wp_294_options' doesn't exist for query SELECT option_value FROM wp_294_options WHERE option_name = 'wp_294_user_roles' LIMIT 1 made by require_once('wp-admin/network/admin.php'), require_once('wp-admin/admin.php'), do_action('load-index_page_clone_site'), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WPMUDEV_Cloner_Admin_Clone_Site->sanitize_clone_form, WPMUDEV_Cloner_Admin_Clone_Site->pre_clone_actions, WPMUDEV_Cloner_Admin_Clone_Site->create_empty_blog, switch_to_blog, WP_Roles->__construct, WP_Roles->_init, get_option
[16-Jan-2017 15:05:57 UTC] WordPress database error Table 'skizzar_db.wp_294_options' doesn't exist for query SELECT option_value FROM wp_294_options WHERE option_name = 'blogname' LIMIT 1 made by require_once('wp-admin/network/admin.php'), require_once('wp-admin/admin.php'), do_action('load-index_page_clone_site'), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WPMUDEV_Cloner_Admin_Clone_Site->sanitize_clone_form, WPMUDEV_Cloner_Admin_Clone_Site->pre_clone_actions, WPMUDEV_Cloner_Admin_Clone_Site->create_empty_blog, install_blog, get_blogaddress_by_id, WP_Site->__get, WP_Site->get_details, get_option
[16-Jan-2017 15:05:57 UTC] WordPress database error Table 'skizzar_db.wp_294_options' doesn't exist for query SELECT option_value FROM wp_294_options WHERE option_name = 'siteurl' LIMIT 1 made by require_once('wp-admin/network/admin.php'), require_once('wp-admin/admin.php'), do_action('load-index_page_clone_site'), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WPMUDEV_Cloner_Admin_Clone_Site->sanitize_clone_form, WPMUDEV_Cloner_Admin_Clone_Site->pre_clone_actions, WPMUDEV_Cloner_Admin_Clone_Site->create_empty_blog, install_blog, get_blogaddress_by_id, WP_Site->__get, WP_Site->get_details, get_option
[16-Jan-2017 15:05:57 UTC] WordPress database error Table 'skizzar_db.wp_294_options' doesn't exist for query SELECT option_value FROM wp_294_options WHERE option_name = 'post_count' LIMIT 1 made by require_once('wp-admin/network/admin.php'), require_once('wp-admin/admin.php'), do_action('load-index_page_clone_site'), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WPMUDEV_Cloner_Admin_Clone_Site->sanitize_clone_form, WPMUDEV_Cloner_Admin_Clone_Site->pre_clone_actions, WPMUDEV_Cloner_Admin_Clone_Site->create_empty_blog, install_blog, get_blogaddress_by_id, WP_Site->__get, WP_Site->get_details, get_option
[16-Jan-2017 15:05:57 UTC] WordPress database error Table 'skizzar_db.wp_294_options' doesn't exist for query SELECT option_value FROM wp_294_options WHERE option_name = 'home' LIMIT 1 made by require_once('wp-admin/network/admin.php'), require_once('wp-admin/admin.php'), do_action('load-index_page_clone_site'), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, WPMUDEV_Cloner_Admin_Clone_Site->sanitize_clone_form, WPMUDEV_Cloner_Admin_Clone_Site->pre_clone_actions, WPMUDEV_Cloner_Admin_Clone_Site->create_empty_blog, install_blog, get_blogaddress_by_id, WP_Site->__get, WP_Site->get_details, get_option
[16-Jan-2017 15:06:48 UTC] PHP Fatal error:  Cannot use object of type WP_Error as array in /usr/share/nginx/skizzar/wp-content/plugins/cloner/copier/class.copier-pages.php on line 33