Extra fixes related to the recent commits

Author: birdofpreyru

src/shared/components/challenge-detail/Header/index.jsx

@@ -95,7 +95,7 @@ export default function ChallengeHeader(props) {
    * iterate through all their submissions and ensure that all of them
    * are Deleted
   */
-  const hasSubmissions = userDetails && userDetails.submissions.reduce(
+  const hasSubmissions = userDetails && (userDetails.submissions || []).reduce(
     (acc, submission) => acc || submission.status !== 'Deleted', false);
 
   const nextPhase =

src/shared/reducers/challenge.js

@@ -49,6 +49,8 @@ function onGetDetailsInit(state, action) {
 function onGetDetailsDone(state, action) {
   if (action.error) {
     logger.error('Failed to get challenge details!', action.payload);
+    fireErrorMessage('ERROR: Failed to load the challenge',
+      'Please, try again a bit later');
     return {
       ...state,
       fetchChallengeFailure: action.error,