Making the core rating system work on JReviews pages
From JReviews Documentation
By default JReviews disables core ratings in the categories where it is used to avoid duplicate ratings (core + JReviews) if you have enabled core ratings in Joomla to use outside of JReviews.
If you want to use both core ratings + JReviews on the same pages, then you need to edit one of the JReviews files.
- /components/com_jreviews/jreviews/controllers/com_content_controller.php
Comment out this line (it exists on several different places in the file):
$content_params->set('show_vote',0);