I'm working on localhost.
I checked the module's TPL and JS files but couldn't find the solution and even the browser console isn't showing any errors.
Edit: I tried editing "productcomments.php" file and the contents are displayed after removing lines 941 to 943 (code below).
Of course, the smarty variables are empty in "product-list-reviews.tpl" file since we removed its required code but just want to inform that these 3 lines are causing this problem.
public function hookDisplayProductListReviews($params) { .......... /* Lines 941 to 943 */ $productCommentRepository = $this->context->controller->getContainer()->get('product_comment_repository'); $commentsNb = $productCommentRepository->getCommentsNumber($product->getId(), Configuration::get('PRODUCT_COMMENTS_MODERATE')); $averageGrade = $productCommentRepository->getAverageGrade($product->getId(), Configuration::get('PRODUCT_COMMENTS_MODERATE')); .......... }