protected function install() {

		// Check if the plugin already exists and activate it if it is.
		$ret = $this->activate_already_installed_plugin();

		// Plugin doesn't exist, install it.
		if ( false === $ret ) {
			$ret = $this->install_plugin();
		}

		// Final check to ensure the connector is installed and activated.
		if ( true === $ret && ! $this->is_installed() ) {
			// Translators: %s = title of the email delivery plugin.
			return new WP_Error( 'llms_' . $this->id . '_not_found', sprtinf( __( '%s plugin not found. Please try again.', 'lifterlms' ), $this->get_title() ), $install );
		}

		return $ret;

	}