Thanks for checking!
It was the missing wp_head() and wp_footer().
OK – it seems this function is not working properly for me:
function add_my_awesome_widgets_collection($folders){
$folders[] = plugin_dir_path(__FILE__).'extra-widgets/';
return $folders;
}
Only way to register the folder for me was to edit the SiteOrigin_Widgets_Bundle Class. Add my folder to the get_widget_folders() function.
