Fatal error: Uncaught Error: Class "Magento\Sales\Model\AbstractNotifier" not found in /home/airtimer/public_html/vendor/magento/module-inventory-in-store-pickup-sales/Model/Order/Email/ReadyForPickupNotifier.php:19 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/magento/module-inventory-in-store-pickup-sales/Model/Order/Email/ReadyForPickupNotifier.php on line 19