Fatal error: Uncaught TypeError: Return value of Salons\Feefo\Block\ReviewsWidget::getProductSku() must be of the type string, null returned in /domains/salonsdirect.com/___http/releases/57/app/code/Salons/Feefo/Block/ReviewsWidget.php:38 Stack trace: #0 /domains/salonsdirect.com/___http/releases/57/app/code/Salons/Feefo/Block/ReviewsWidget.php(20): Salons\Feefo\Block\ReviewsWidget->getProductSku() #1 /domains/salonsdirect.com/___http/releases/57/vendor/feefo/reviews/view/frontend/templates/reviews.phtml(7): Salons\Feefo\Block\ReviewsWidget->getSnippet() #2 /domains/salonsdirect.com/___http/releases/57/vendor/magento/framework/View/TemplateEngine/Php.php(59): include('/domains/salons...') #3 /domains/salonsdirect.com/___http/releases/57/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\TemplateEngine\Php->render(Object(Salons\Feefo\Block\ReviewsWidget), '/domains/salons...', Array) #4 /domains/salonsdirect.com/___http/releases/57/vendor/magento/framework/Interception/Interceptor.php(138): M in /domains/salonsdirect.com/___http/releases/57/app/code/Salons/Feefo/Block/ReviewsWidget.php on line 38