Regarding this issue, please update the following file below:
1. “/wp-content/plugins/jnews-jsonld/class.jnews-jsonld.php” with this one https://www.dropbox.com/s/7phna5cralr6f01/class.jnews-jsonld.php?dl=0
2. “/wp-content/plugins/jnews-review/review-option.php” with this one https://www.dropbox.com/s/y3dbbf463j1rf7j/review-option.php?dl=0
3. “/wp-content/plugins/jnews-review/metabox/post-review-setting.php” with this one https://www.dropbox.com/s/2xt2uz8az3mcs8r/post-review-setting.php?dl=0
Then you need to insert the brand name of your product and set up the price currency on the Customize > JNews Additional Option > Review > Price Currency
Let me know if you need further help. We will push an update as soon.