I have been looking at your website today and would like to use the "Latest Posts" plugin on a sit I am building at the moment but I just can't get the plugin to work. I am building the site with Beaver Builder and the theme I am using is Ultimatum https://ultimatumtheme.com/
The page I have placed the widget on is http://www.tlc-online.co.uk/uk_paper_and_envelope_sizes/
to see this you will have to login to the backend of the site, here are the details and why I did not use Wordpress Support to ask the question.
Thank you for your help with this.