Hi @somorgado (Sofia).
I still get “updating failed” when saving with the rpwe shortcode. So I enter the shortcode, disable the plugin, save the page, then re-enable. It seems to work.
I still don’t get thumbnails derived from the images in the posts, so I set the thumbnails all to the same image.
It would seem that this sub-forum is no longer monitored and this plugin is no longer supported, unfortunately.