diff --git a/scripts/langindex.json b/scripts/langindex.json
index 055b3b689..be9ec43d9 100644
--- a/scripts/langindex.json
+++ b/scripts/langindex.json
@@ -730,6 +730,7 @@
   "addon.mod_quiz.attemptnumber": "quiz",
   "addon.mod_quiz.attemptquiznow": "quiz",
   "addon.mod_quiz.attemptstate": "quiz",
+  "addon.mod_quiz.canattemptbutnotsubmit": "local_moodlemobileapp",
   "addon.mod_quiz.cannotsubmitquizdueto": "local_moodlemobileapp",
   "addon.mod_quiz.clearchoice": "qtype_multichoice",
   "addon.mod_quiz.comment": "quiz",
@@ -802,6 +803,7 @@
   "addon.mod_quiz.warningattemptfinished": "local_moodlemobileapp",
   "addon.mod_quiz.warningdatadiscarded": "local_moodlemobileapp",
   "addon.mod_quiz.warningdatadiscardedfromfinished": "local_moodlemobileapp",
+  "addon.mod_quiz.warningquestionsnotsupported": "local_moodlemobileapp",
   "addon.mod_quiz.yourfinalgradeis": "quiz",
   "addon.mod_resource.errorwhileloadingthecontent": "local_moodlemobileapp",
   "addon.mod_resource.modifieddate": "resource",
@@ -1318,7 +1320,12 @@
   "core.comments.comments": "moodle",
   "core.comments.commentscount": "moodle",
   "core.comments.commentsnotworking": "local_moodlemobileapp",
+  "core.comments.deletecommentbyon": "moodle",
+  "core.comments.eventcommentcreated": "moodle",
+  "core.comments.eventcommentdeleted": "moodle",
   "core.comments.nocomments": "moodle",
+  "core.comments.savecomment": "moodle",
+  "core.comments.warningcommentsnotsent": "local_moodlemobileapp",
   "core.commentscount": "moodle",
   "core.commentsnotworking": "local_moodlemobileapp",
   "core.completion-alt-auto-fail": "completion",
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 bb204717c..7f7cb5b74 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
@@ -90,7 +90,7 @@
             <ion-item text-wrap class="core-danger-item" *ngIf="quiz.hasquestions === 0">
                 <p>{{ 'addon.mod_quiz.noquestions' | translate }}</p>
             </ion-item>
-            <ion-item text-wrap class="core-danger-item" *ngIf="unsupportedQuestions && unsupportedQuestions.length">
+            <ion-item text-wrap class="core-danger-item" *ngIf="!hasSupportedQuestions && unsupportedQuestions && unsupportedQuestions.length">
                 <p>{{ 'addon.mod_quiz.errorquestionsnotsupported' | translate }}</p>
                 <p *ngFor="let type of unsupportedQuestions">{{ type }}</p>
             </ion-item>
@@ -109,6 +109,13 @@
                 {{ 'core.hasdatatosync' | translate: {$a: moduleName} }}
             </div>
 
+            <!-- Other warnings. -->
+            <ion-item text-wrap class="core-warning-item" *ngIf="hasSupportedQuestions && unsupportedQuestions && unsupportedQuestions.length">
+                <p>{{ 'addon.mod_quiz.canattemptbutnotsubmit' | translate }}</p>
+                <p>{{ 'addon.mod_quiz.warningquestionsnotsupported' | translate }}</p>
+                <p *ngFor="let type of unsupportedQuestions">{{ type }}</p>
+            </ion-item>
+
             <!-- Button to start/continue. -->
             <ion-item *ngIf="buttonText && !showStatusSpinner">
                 <button ion-button block (click)="attemptQuiz()">
@@ -117,7 +124,7 @@
             </ion-item>
 
             <!-- Button to open in browser if it cannot be attempted in the app. -->
-            <ion-item *ngIf="!buttonText && ((unsupportedQuestions && unsupportedQuestions.length) || (unsupportedRules && unsupportedRules.length) || behaviourSupported === false)">
+            <ion-item *ngIf="!buttonText && ((!hasSupportedQuestions && unsupportedQuestions && unsupportedQuestions.length) || (unsupportedRules && unsupportedRules.length) || behaviourSupported === false)">
                 <a ion-button block [href]="externalUrl" core-link icon-end>
                     {{ 'core.openinbrowser' | translate }}
                     <ion-icon name="open"></ion-icon>
diff --git a/src/addon/mod/quiz/components/index/index.ts b/src/addon/mod/quiz/components/index/index.ts
index 32eef2714..cabdb8406 100644
--- a/src/addon/mod/quiz/components/index/index.ts
+++ b/src/addon/mod/quiz/components/index/index.ts
@@ -38,6 +38,7 @@ export class AddonModQuizIndexComponent extends CoreCourseModuleMainActivityComp
     now: number; // Current time.
     syncTime: string; // Last synchronization time.
     hasOffline: boolean; // Whether the quiz has offline data.
+    hasSupportedQuestions: boolean; // Whether the quiz has at least 1 supported question.
     accessRules: string[]; // List of access rules of the quiz.
     unsupportedRules: string[]; // List of unsupported access rules of the quiz.
     unsupportedQuestions: string[]; // List of unsupported question types of the quiz.
@@ -214,6 +215,9 @@ export class AddonModQuizIndexComponent extends CoreCourseModuleMainActivityComp
                 // Get question types in the quiz.
                 return this.quizProvider.getQuizRequiredQtypes(this.quizData.id).then((types) => {
                     this.unsupportedQuestions = this.quizProvider.getUnsupportedQuestions(types);
+                    this.hasSupportedQuestions = !!types.find((type) => {
+                        return type != 'random' && this.unsupportedQuestions.indexOf(type) == -1;
+                    });
 
                     return this.getAttempts();
                 });
@@ -301,7 +305,7 @@ export class AddonModQuizIndexComponent extends CoreCourseModuleMainActivityComp
                 this.buttonText = '';
             } else if (this.quizAccessInfo.canattempt && this.preventMessages.length) {
                 this.buttonText = '';
-            } else if (this.unsupportedQuestions.length || this.unsupportedRules.length || !this.behaviourSupported) {
+            } else if (!this.hasSupportedQuestions || this.unsupportedRules.length || !this.behaviourSupported) {
                 this.buttonText = '';
             }
         }
diff --git a/src/addon/mod/quiz/lang/en.json b/src/addon/mod/quiz/lang/en.json
index c5be9879f..3a0b0431e 100644
--- a/src/addon/mod/quiz/lang/en.json
+++ b/src/addon/mod/quiz/lang/en.json
@@ -5,6 +5,7 @@
     "attemptnumber": "Attempt",
     "attemptquiznow": "Attempt quiz now",
     "attemptstate": "State",
+    "canattemptbutnotsubmit": "You can attempt this quiz in the app, but you will need to submit the attempt in browser for the following reasons:",
     "cannotsubmitquizdueto": "This quiz attempt cannot be submitted for the following reasons:",
     "clearchoice": "Clear my choice",
     "comment": "Comment",
@@ -23,7 +24,7 @@
     "errorgetquestions": "Error getting questions.",
     "errorgetquiz": "Error getting quiz data.",
     "errorparsequestions": "An error occurred while reading the questions. Please attempt this quiz in a web browser.",
-    "errorquestionsnotsupported": "This quiz can't be attempted in the app because it contains questions not supported by the app:",
+    "errorquestionsnotsupported": "This quiz can't be attempted in the app because it only contains questions not supported by the app:",
     "errorrulesnotsupported": "This quiz can't be attempted in the app because it has access rules not supported by the app:",
     "errorsaveattempt": "An error occurred while saving the attempt data.",
     "feedback": "Feedback",
@@ -77,5 +78,6 @@
     "warningattemptfinished": "Offline attempt discarded as it was finished on the site or not found.",
     "warningdatadiscarded": "Some offline answers were discarded because the questions were modified online.",
     "warningdatadiscardedfromfinished": "Attempt unfinished because some offline answers were discarded. Please review your answers then resubmit the attempt.",
+    "warningquestionsnotsupported": "This quiz contains questions not supported by the app:",
     "yourfinalgradeis": "Your final grade for this quiz is {{$a}}."
 }
\ No newline at end of file
diff --git a/src/addon/mod/quiz/providers/quiz.ts b/src/addon/mod/quiz/providers/quiz.ts
index cb36b5928..114963f9e 100644
--- a/src/addon/mod/quiz/providers/quiz.ts
+++ b/src/addon/mod/quiz/providers/quiz.ts
@@ -649,10 +649,18 @@ export class AddonModQuizProvider {
         const messages = [];
 
         questions.forEach((question) => {
-            let message = this.questionDelegate.getPreventSubmitMessage(question);
-            if (message) {
-                message = this.translate.instant(message);
-                messages.push(this.translate.instant('core.question.questionmessage', {$a: question.slot, $b: message}));
+            if (question.type != 'random' && !this.questionDelegate.isQuestionSupported(question.type)) {
+                // The question isn't supported.
+                messages.push(this.translate.instant('core.question.questionmessage', {
+                    $a: question.slot,
+                    $b: this.translate.instant('core.question.errorquestionnotsupported', {$a: question.type})
+                }));
+            } else {
+                let message = this.questionDelegate.getPreventSubmitMessage(question);
+                if (message) {
+                    message = this.translate.instant(message);
+                    messages.push(this.translate.instant('core.question.questionmessage', {$a: question.slot, $b: message}));
+                }
             }
         });
 
diff --git a/src/assets/lang/en.json b/src/assets/lang/en.json
index 2d4f93f46..c49e44610 100644
--- a/src/assets/lang/en.json
+++ b/src/assets/lang/en.json
@@ -729,6 +729,7 @@
     "addon.mod_quiz.attemptnumber": "Attempt",
     "addon.mod_quiz.attemptquiznow": "Attempt quiz now",
     "addon.mod_quiz.attemptstate": "State",
+    "addon.mod_quiz.canattemptbutnotsubmit": "You can attempt this quiz in the app, but you will need to submit the attempt in browser for the following reasons:",
     "addon.mod_quiz.cannotsubmitquizdueto": "This quiz attempt cannot be submitted for the following reasons:",
     "addon.mod_quiz.clearchoice": "Clear my choice",
     "addon.mod_quiz.comment": "Comment",
@@ -747,7 +748,7 @@
     "addon.mod_quiz.errorgetquestions": "Error getting questions.",
     "addon.mod_quiz.errorgetquiz": "Error getting quiz data.",
     "addon.mod_quiz.errorparsequestions": "An error occurred while reading the questions. Please attempt this quiz in a web browser.",
-    "addon.mod_quiz.errorquestionsnotsupported": "This quiz can't be attempted in the app because it contains questions not supported by the app:",
+    "addon.mod_quiz.errorquestionsnotsupported": "This quiz can't be attempted in the app because it only contains questions not supported by the app:",
     "addon.mod_quiz.errorrulesnotsupported": "This quiz can't be attempted in the app because it has access rules not supported by the app:",
     "addon.mod_quiz.errorsaveattempt": "An error occurred while saving the attempt data.",
     "addon.mod_quiz.feedback": "Feedback",
@@ -801,6 +802,7 @@
     "addon.mod_quiz.warningattemptfinished": "Offline attempt discarded as it was finished on the site or not found.",
     "addon.mod_quiz.warningdatadiscarded": "Some offline answers were discarded because the questions were modified online.",
     "addon.mod_quiz.warningdatadiscardedfromfinished": "Attempt unfinished because some offline answers were discarded. Please review your answers then resubmit the attempt.",
+    "addon.mod_quiz.warningquestionsnotsupported": "This quiz contains questions not supported by the app:",
     "addon.mod_quiz.yourfinalgradeis": "Your final grade for this quiz is {{$a}}.",
     "addon.mod_resource.errorwhileloadingthecontent": "Error while loading the content.",
     "addon.mod_resource.modifieddate": "Modified {{$a}}",
diff --git a/src/core/question/components/question/question.ts b/src/core/question/components/question/question.ts
index fbb31b6cf..11b276ce4 100644
--- a/src/core/question/components/question/question.ts
+++ b/src/core/question/components/question/question.ts
@@ -64,7 +64,7 @@ export class CoreQuestionComponent implements OnInit {
     ngOnInit(): void {
         this.offlineEnabled = this.utils.isTrueOrOne(this.offlineEnabled);
 
-        if (!this.question) {
+        if (!this.question || (this.question.type != 'random' && !this.questionDelegate.isQuestionSupported(this.question.type))) {
             this.loaded = true;
 
             return;
@@ -145,6 +145,8 @@ export class CoreQuestionComponent implements OnInit {
                     this.questionHelper.extractQuestionFeedback(this.question);
                     this.questionHelper.extractQuestionComment(this.question);
                 });
+            } else {
+                this.loaded = true;
             }
         }).catch(() => {
             // Ignore errors.