車両情報変更申請の変更日がNULLでも処理落ちしないように修正

app/Email/Members/VehicleInfoUpdateOrderApprove.php

@@ -32,12 +32,13 @@ class VehicleInfoUpdateOrderApprove extends Members
 
     public function getMemberParams(): array
     {
+        $app = $this->app;
         return [
-            'parking_name' => $this->app->parkingName,
-            'vehicle_no' => $this->app->vehicleNoAfter,
-            'register_no' => $this->app->registerNoAfter,
-            'change_date' => $this->app->changeDate->format('Y/m/d'),
-            'memo' => $this->app->memo,
+            'parking_name' => $app->parkingName,
+            'vehicle_no' => $app->vehicleNoAfter,
+            'register_no' => $app->registerNoAfter,
+            'change_date' => $app->changeDate ? $app->changeDate->format('Y/m/d') : "-",
+            'memo' => $app->memo,
         ];
     }
 }