活动行事历导入优化

app/Http/Controllers/Admin/EventCalendarController.php

@@ -391,7 +391,7 @@ class EventCalendarController extends BaseController
                 __('controller.import.success')
             );
         } catch (ValidationException|CustomException $e) {
-            throw $e;
+            return $this->responseService->businessError($e->getMessage());
         } catch (Exception $e) {
             return $this->responseService->systemError(
                 __('exception.admin_vip_list.import_failed') . '：'