#0 public_html/vendor/magento/module-fedex/Model/Carrier.php(671): MagentoFrameworkAppErrorHandler->handler(8, 'Undefined prope...', '/home/atlan621/...', 671, Array)
#1 /public_html/vendor/magento/module-fedex/Model/Carrier.php(615): MagentoFedexModelCarrier->_getRateAmountOriginBased(Object(stdClass))
#2 /public_html/vendor/magento/module-fedex/Model/Carrier.php(576): MagentoFedexModelCarrier->_prepareRateResponse(Object(stdClass))
#3 /public_html/vendor/magento/module-fedex/Model/Carrier.php(288): MagentoFedexModelCarrier->_getQuotes()
#4 public_html/vendor/magento/module-shipping/Model/Shipping.php(293): MagentoFedexModelCarrier->collectRates(Object(MagentoQuoteModelQuoteAddressRateRequest))
#5 /public_html/vendor/magento/module-shipping/Model/Shipping.php(209): MagentoShippingModelShipping->collectCarrierRates('fedex', Object(MagentoQuoteModelQuoteAddressRateRequest))
#6 /public_html/vendor/magento/module-quote/Model/Quote/Address.php(995): MagentoShippingModelShipping->collectRates(Object(MagentoQuoteModelQuoteAddressRateRequest))
#7 /public_html/vendor/magento/module-quote/Model/Quote/Address.php(936): MagentoQuoteModelQuoteAddress->requestShippingRates()
#8 /public_html/vendor/magento/module-quote/Model/Quote/Address/Total/Shipping.php(161): MagentoQuoteModelQuoteAddress->collectShippingRates()
#9 public_html/vendor/magento/module-quote/Model/Quote/TotalsCollector.php(265): MagentoQuoteModelQuoteAddressTotalShipping->collect(Object(MagentoQuoteModelQuote), Object(MagentoQuoteModelShippingAssignment), Object(MagentoQuoteModelQuoteAddressTotal))
#10 /public_html/vendor/magento/module-quote/Model/ShippingMethodManagement.php(273): MagentoQuoteModelQuoteTotalsCollector->collectAddressTotals(Object(MagentoQuoteModelQuote), Object(MagentoQuoteModelQuoteAddress))
#11 /home/atlan621/public_html/vendor/magento/module-quote/Model/ShippingMethodManagement.php(213): MagentoQuoteModelShippingMethodManagement->getShippingMethods(Object(MagentoQuoteModelQuote), Array)
#12 [internal function]: MagentoQuoteModelShippingMethodManagement->estimateByExtendedAddress('1437', Object(MagentoQuoteModelQuoteAddress))
#13 /home/atlan621/public_html/vendor/magento/module-webapi/Controller/Rest.php(307): call_user_func_array(Array, Array)
#14 public_html/vendor/magento/module-webapi/Controller/Rest.php(216): MagentoWebapiControllerRest->processApiRequest()
#15 public_html/var/generation/Magento/Webapi/Controller/Rest/Interceptor.php(24): MagentoWebapiControllerRest->dispatch(Object(MagentoFrameworkAppRequestHttp))
#16 public_html/vendor/magento/framework/App/Http.php(135): MagentoWebapiControllerRestInterceptor->dispatch(Object(MagentoFrameworkAppRequestHttp))
#17 //public_html/vendor/magento/framework/App/Bootstrap.php(258): MagentoFrameworkAppHttp->launch()
#18 /public_html/index.php(39): MagentoFrameworkAppBootstrap->run(Object(MagentoFrameworkAppHttp))
#19 {main}

Next exception 'Exception' with message 'Report ID: webapi-596c83febd24a; Message: Notice: Undefined property: stdClass::$ShipmentRateDetail in public_html/vendor/magento/module-fedex/Model/Carrier.php on line 671' in public_html/vendor/magento/framework/Webapi/ErrorProcessor.php:195
Stack trace:
#0 public_html/vendor/magento/framework/Webapi/ErrorProcessor.php(139): MagentoFrameworkWebapiErrorProcessor->_critical(Object(Exception))
/public_html/vendor/magento/module-webapi/Controller/Rest.php(219): MagentoFrameworkWebapiErrorProcessor->maskException(Object(Exception))
#2 public_html/var/generation/Magento/Webapi/Controller/Rest/Interceptor.php(24): MagentoWebapiControllerRest->dispatch(Object(MagentoFrameworkAppRequestHttp))
#3public_html/vendor/magento/framework/App/Http.php(135): MagentoWebapiControllerRestInterceptor->dispatch(Object(MagentoFrameworkAppRequestHttp))
#4 /public_html/vendor/magento/framework/App/Bootstrap.php(258): MagentoFrameworkAppHttp->launch()
#5 /public_html/index.php(39): MagentoFrameworkAppBootstrap->run(Object(MagentoFrameworkAppHttp))