current_user &&

public/react/src/modules/courses/exercise/ExerciseNew.js

@@ -407,11 +407,11 @@ class ExerciceNew extends Component{
             }
           `}</style>
           <div className="edu-class-container edu-position courseForm">
-            <CBreadcrumb items={[
+            { current_user && <CBreadcrumb items={[
               { to: current_user.first_category_url, name: this.props.coursedata ? this.props.coursedata.name : ''},
               { to: `/courses/${courseId}/exercises/${left_banner_id}`, name: '试卷列表' },
               { name: this.isEdit ? '编辑试卷' : '新建试卷'}
-            ]}></CBreadcrumb>
+            ]}></CBreadcrumb> }
 
             <p className="clearfix mt20 mb20">
               <span className="fl font-24 color-grey-3">{this.isEdit ? "编辑" : "新建"}试卷</span>