Fatal error: Uncaught Error: Class "Magento\Shipping\Model\Carrier\AbstractCarrier" not found in /home/airtimer/public_html/vendor/magento/module-inventory-in-store-pickup-shipping-api/Model/Carrier/InStorePickup.php:31 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/magento/module-inventory-in-store-pickup-shipping-api/Model/Carrier/InStorePickup.php on line 31