* @return array|WP_Error
	 */
	private function get_data() {

		$this->data = llms_get_add_ons();

		if ( ! is_wp_error( $this->data ) ) {
			foreach ( $this->data['items'] as $key => $addon ) {
				// Exclude the core plugin and helper plugin.
				if ( in_array( $addon['id'], array( 'lifterlms-com-lifterlms', 'lifterlms-com-lifterlms-helper' ), true ) ) {
					unset( $this->data['items'][ $key ] );
				}

				// Exclude uncategorized Add-ons.
				if ( array_key_exists( 'uncategorized', $addon['categories'] ) ) {
					unset( $this->data['items'][ $key ] );