Fatal error: Uncaught TypeError: mysqli_fetch_array(): Argument #1 ($result) must be of type mysqli_result, bool given in /home/marketappz/public_html/Shopify-Subscription-App/App/calculateDeliveryDate.php:15 Stack trace: #0 /home/marketappz/public_html/Shopify-Subscription-App/App/calculateDeliveryDate.php(15): mysqli_fetch_array(false) #1 /home/marketappz/public_html/Shopify-Subscription-App/App/calculateDeliveryDateNew.php(4): returnDeliveryDate('sGiGB0Sjph', '4227', '11/28/2019 08:5...', 'cron', true) #2 {main} thrown in /home/marketappz/public_html/Shopify-Subscription-App/App/calculateDeliveryDate.php on line 15