corrected di.xml and Account.php files

Author: solwininfotech

app/code/Magento/Sales/Block/Adminhtml/Order/Create/Form/Account.php

@@ -165,16 +165,14 @@ public function getFormValues()
     {
         try {
             $customer = $this->customerRepository->getById($this->getCustomerId());
-        } catch (\Exception $e) {
-            /** If customer does not exist do nothing. */
-        }
-        $data = isset($customer)
-            ? $this->_extensibleDataObjectConverter->toFlatArray(
+            $data = $this->_extensibleDataObjectConverter->toFlatArray(
                 $customer,
                 [],
-                \Magento\Customer\Api\Data\CustomerInterface::class
-            )
-            : [];
+                CustomerInterface::class
+            );
+        } catch (\Exception $e) {
+            $data = [];
+        }
         foreach ($this->getQuote()->getData() as $key => $value) {
             if (strpos($key, 'customer_') === 0) {
                 $data[substr($key, 9)] = $value;

app/etc/di.xml

@@ -47,6 +47,7 @@
     <preference for="Magento\Framework\App\RequestSafetyInterface" type="Magento\Framework\App\Request\Http" />
     <preference for="\Magento\Framework\Setup\SchemaSetupInterface" type="\Magento\Setup\Module\Setup" />
     <preference for="\Magento\Framework\Setup\ModuleDataSetupInterface" type="\Magento\Setup\Module\DataSetup" />
+    <preference for="Magento\Framework\App\ExceptionHandlerInterface" type="Magento\Framework\App\ExceptionHandler" />
     <type name="Magento\Store\Model\Store">
         <arguments>
             <argument name="currencyInstalled" xsi:type="string">system/currency/installed</argument>
@@ -1777,4 +1778,7 @@
                 type="Magento\Framework\Mail\MimeMessage" />
     <preference for="Magento\Framework\Mail\MimePartInterface"
                 type="Magento\Framework\Mail\MimePart" />
+    <type name="Magento\Framework\DB\Adapter\AdapterInterface">
+        <plugin name="execute_commit_callbacks" type="Magento\Framework\Model\ExecuteCommitCallbacks" />
+    </type>
 </config>