Autoactivate widget after plugin activation (Livemesh SiteOrigin Widgets)

Hi,

We are using Livemesh SiteOrigin Widgets in our theme and would like to activate the testimonal slider widget after the plugin is installed and activated by default. I use the code underneath but for some reason the whole WordPress installation gets broken after the plugin is activated. Also, I first have to click next in the box that appears for live connection. When I put back the code after this the activation works.

Any idea how to pass this or how to see if this boxed is passed and then let the code does his thing?

/**
 * Activate Siteorigin Livemesh widget after import
 */

if ( is_plugin_active( 'livemesh-siteorigin-widgets/livemesh-siteorigin-widgets.php' ) ) {

$folder = WP_PLUGIN_DIR . '/livemesh-siteorigin-widgets/includes/widgets/';
$widget_ids = array('lsow-testimonials-slider-widget');
foreach ($widget_ids as $widget_id) {

	if( !file_exists($folder . $widget_id . '/' . $widget_id . '.php') ) continue;

		wp_cache_delete( 'siteorigin_widgets_active', 'options' );
		$active_widgets = SiteOrigin_Widgets_Bundle::single()->get_active_widgets();
		$active_widgets[$widget_id] = true;
		update_option( 'siteorigin_widgets_active', $active_widgets );
		wp_cache_delete( 'active_widgets', 'siteorigin_widgets' );
}

} 

Thanks