Getting

Hi, I have been using the Product Review plug in for a long while but today I have noticed I am getting this text at top of all the posts that have Product Review enabled.
Warning: count(): Parameter must be an array or an object that implements Countable in /home/aussiepa/public_html/satonmybutt.co.uk/wp-content/plugins/product-review/includes/helper-functions.php on line 210
I have attached a screenshot, any ideas why?

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