null

public/react/src/modules/courses/busyWork/CommonWorkPost.js

@@ -69,7 +69,7 @@ class CommonWorkPost extends Component{
                 status: 'done'
               }
             })
-            const _memebers = response.data.members.slice(0);
+            const _memebers = response.data.members ? response.data.members.slice(0) : [];
             this._edit_init_memebers = _memebers
             delete response.data.members;
             this.setState({