You can create review templates using the Elementor plugin. Elementor is a free page builder plugin. While you can use Ultimate Reviewer without this plugin in the form of shortcodes, it is not recommended as the default review templates will not work.
If you do not have the Elementor plugin installed do the following:
Step 1: Go to Plugins > Add New.
Step 2: In the search box type “elementor” and this will find the “Elementor Page Builder” plugin.
Step 3: Click Install Now and then Activate.