diff --git a/src/addon/mod/quiz/components/index/addon-mod-quiz-index.html b/src/addon/mod/quiz/components/index/addon-mod-quiz-index.html
index 04a3b504b..5304251e7 100644
--- a/src/addon/mod/quiz/components/index/addon-mod-quiz-index.html
+++ b/src/addon/mod/quiz/components/index/addon-mod-quiz-index.html
@@ -33,7 +33,7 @@
     </ion-card>
 
     <!-- List of user attempts. -->
-    <ion-card class="addon-mod_quiz-table" *ngIf="attempts && attempts.length">
+    <ion-card class="addon-mod_quiz-table" *ngIf="quiz && attempts && attempts.length">
         <ion-card-header text-wrap>
             <h2>{{ 'addon.mod_quiz.summaryofattempts' | translate }}</h2>
         </ion-card-header>
@@ -64,7 +64,7 @@
     </ion-card>
 
     <!-- Result info. -->
-    <ion-card *ngIf="showResults && (gradeResult || gradeOverridden || gradebookFeedback || (quiz.showFeedbackColumn && overallFeedback))">
+    <ion-card *ngIf="quiz && showResults && (gradeResult || gradeOverridden || gradebookFeedback || (quiz.showFeedbackColumn && overallFeedback))">
         <ion-list>
             <ion-item text-wrap *ngIf="gradeResult">{{ gradeResult }}</ion-item>
             <ion-item text-wrap *ngIf="gradeOverridden">{{ 'core.course.overriddennotice' | translate }}</ion-item>
diff --git a/src/core/question/providers/helper.ts b/src/core/question/providers/helper.ts
index f1c9b5b3c..4e0f6075f 100644
--- a/src/core/question/providers/helper.ts
+++ b/src/core/question/providers/helper.ts
@@ -530,6 +530,7 @@ export class CoreQuestionHelperProvider {
     prepareAnswers(questions: any[], answers: any, offline?: boolean, siteId?: string): Promise<any> {
         const promises = [];
 
+        questions = questions || [];
         questions.forEach((question) => {
             promises.push(this.questionDelegate.prepareAnswersForQuestion(question, answers, offline, siteId));
         });