For 3rd Party Reviews to display correctly in your widgets, you must set your Local Review settings. Follow this link for detailed instructions.
Our third-party review collection is a bolt-on that is available across all of our plans.
Log in to your Reviews.io account
Navigate to Publishing >> Widget Library
Select Local Reviews from the Features list so that it is checked. This will then show all widgets compatible with Local and Company reviews.
Need help installing widgets on your platform, review our Integration help articles