diff --git a/src/views/faceteach/FaceTeachSignUp.vue b/src/views/faceteach/FaceTeachSignUp.vue
index 11287db..4f6adf0 100644
--- a/src/views/faceteach/FaceTeachSignUp.vue
+++ b/src/views/faceteach/FaceTeachSignUp.vue
@@ -215,7 +215,7 @@ const closeLoading = () => {
   loading.value.close();
 };
 const { data } = useRequest(STU_OFFCOURSE_DETAIL, { courseId }, () => closeLoading());
-const isAllowSign = computed(() => dayjs().isBetween(dayjs(data.value.planDto?.beginTime).subtract(data.value.beforeStart || 0, "minute"), dayjs(data.value.afterStart ? data.value.planDto?.beginTime : data.value.planDto?.endTime).add(data.value.afterStart || 0, "minute")));
+const isAllowSign = computed(() => dayjs().isBetween(dayjs(data.value?.planDto?.beginTime).subtract(data.value?.planDto?.beforeStart || 0, "minute"), dayjs(data.value?.planDto?.afterStart ? data.value?.planDto?.beginTime : data.value?.planDto?.endTime).add(data.value?.planDto?.afterStart || 0, "minute")));
 const teacherInfo = useUserInfo(computed(() => data.value?.planDto?.teacherId));
 const activeName = ref("first");