Update AccountLock.php

fix for "Notice: Undefined index: lock_expires in vendor/magento/module-customer/Ui/Component/Listing/Column/AccountLock.php on line 44"

Author: klict

app/code/Magento/Customer/Ui/Component/Listing/Column/AccountLock.php

@@ -41,9 +41,13 @@ public function prepareDataSource(array $dataSource)
     {
         if (isset($dataSource['data']['items'])) {
             foreach ($dataSource['data']['items'] as & $item) {
-                $lockExpires = new \DateTime($item['lock_expires']);
-                if ($lockExpires > new \DateTime()) {
-                    $item['lock_expires'] =  __('Locked');
+                if (array_key_exists('lock_expires', $item)) {
+                    $lockExpires = new \DateTime($item['lock_expires']);
+                    if ($lockExpires > new \DateTime()) {
+                        $item['lock_expires'] =  __('Locked');
+                    } else {
+                        $item['lock_expires'] = __('Unlocked');
+                    }
                 } else {
                     $item['lock_expires'] = __('Unlocked');
                 }