EDD\Admin\Installers\PluginSilentUpgrader( new \EDD\Admin\Installers\Install_Skin() );

		// Error check.
		if ( ! method_exists( $installer, 'install' ) ) {
			wp_send_json_error( $error );
		}

		$installer->install( $post_url ); // phpcs:ignore

		// Flush the cache and return the newly installed plugin basename.
		wp_cache_flush();

		$plugin_basename = $installer->plugin_info();

		if ( $plugin_basename ) {

			// Activate the plugin silently.
			$activated = activate_plugin( $plugin_basename, '', false, true );

			if ( ! is_wp_error( $activated ) ) {
				wp_send_json_success( esc_html__( 'Plugin installed & activated.', 'easy-digital-downloads' ) );
			}

			$error = esc_html__( 'Easy Digital Downloads (Pro) was installed, but needs to be activated on the Plugins page inside your WordPress admin.', 'easy-digital-downloads' );
		}

		wp_send_json_error( $error );
	}
}