diff --git a/p__Classrooms__Lists__ShixunHomeworks__Comment__index.async.js b/p__Classrooms__Lists__ShixunHomeworks__Comment__index.async.js
index 12c6753fa1..b06eade8ed 100644
--- a/p__Classrooms__Lists__ShixunHomeworks__Comment__index.async.js
+++ b/p__Classrooms__Lists__ShixunHomeworks__Comment__index.async.js
@@ -6486,7 +6486,7 @@ var Comment_ShixunsListPage = function ShixunsListPage(_ref) {
   }();
   (0,_react_17_0_2_react.useEffect)(function () {
     var _classroomList$Assist;
-    if ((0,authority/* isAssistant */.Rm)() && !((_classroomList$Assist = classroomList.AssistantObject.practice) !== null && _classroomList$Assist !== void 0 && _classroomList$Assist.can_view)) {
+    if ((0,authority/* isAssistant */.Rm)() && classroomList.AssistantObject.practice && !((_classroomList$Assist = classroomList.AssistantObject.practice) !== null && _classroomList$Assist !== void 0 && _classroomList$Assist.can_view)) {
       _umi_production_exports.history.replace('/403');
     }
   }, [(_classroomList$Assist2 = classroomList.AssistantObject.practice) === null || _classroomList$Assist2 === void 0 ? void 0 : _classroomList$Assist2.can_view]);