Hot fix for GUI exception on rawfiles with POTCAR.

gui/src/components/entry/RawFiles.js

@@ -178,7 +178,7 @@ class RawFiles extends React.Component {
 
   filterPotcar(file) {
     if (file.toLowerCase().endsWith('potcar')) {
-      return this.props.data.uploader.user_id === this.props.user.sub
+      return this.props.user && this.props.data.uploader.user_id === this.props.user.sub
     } else {
       return true
     }