diff --git a/src/addon/mod/chat/components/index/addon-mod-chat-index.html b/src/addon/mod/chat/components/index/addon-mod-chat-index.html
index 486cbd508..85ae32c07 100644
--- a/src/addon/mod/chat/components/index/addon-mod-chat-index.html
+++ b/src/addon/mod/chat/components/index/addon-mod-chat-index.html
@@ -18,7 +18,7 @@
         <ion-icon name="time"></ion-icon> {{ 'addon.mod_chat.sessionstart' | translate:{$a: chatInfo} }}
     </ion-card>
 
-    <div padding>
+    <div padding *ngIf="chat">
         <a ion-button block color="primary" (click)="enterChat()">{{ 'addon.mod_chat.enterchat' | translate }}</a>
         <a ion-button block color="light" margin-top *ngIf="sessionsAvailable" (click)="viewSessions()">{{ 'addon.mod_chat.viewreport' | translate }}</a>
     </div>
diff --git a/src/addon/mod/data/components/index/index.ts b/src/addon/mod/data/components/index/index.ts
index 2bfae1f2a..ecdd5064e 100644
--- a/src/addon/mod/data/components/index/index.ts
+++ b/src/addon/mod/data/components/index/index.ts
@@ -47,7 +47,7 @@ export class AddonModDataIndexComponent extends CoreCourseModuleMainActivityComp
     timeAvailableFromReadable: string | boolean;
     timeAvailableTo: number | boolean;
     timeAvailableToReadable: string | boolean;
-    isEmpty = false;
+    isEmpty = true;
     groupInfo: CoreGroupInfo;
     entries = [];
     firstEntry = false;
diff --git a/src/addon/mod/feedback/components/index/addon-mod-feedback-index.html b/src/addon/mod/feedback/components/index/addon-mod-feedback-index.html
index 04a263d52..d7652f3fd 100644
--- a/src/addon/mod/feedback/components/index/addon-mod-feedback-index.html
+++ b/src/addon/mod/feedback/components/index/addon-mod-feedback-index.html
@@ -37,7 +37,7 @@
         </core-tabs>
     </ng-container>
 
-    <ng-container *ngIf="!showTabs">
+    <ng-container *ngIf="feedback && !showTabs">
         <ng-container *ngTemplateOutlet="tabOverview"></ng-container>
     </ng-container>
 </core-loading>
diff --git a/src/addon/mod/feedback/components/index/index.ts b/src/addon/mod/feedback/components/index/index.ts
index 57fe7a9f9..daa067482 100644
--- a/src/addon/mod/feedback/components/index/index.ts
+++ b/src/addon/mod/feedback/components/index/index.ts
@@ -113,9 +113,11 @@ export class AddonModFeedbackIndexComponent extends CoreCourseModuleMainActivity
         super.ngOnInit();
 
         this.loadContent(false, true).then(() => {
-            this.feedbackProvider.logView(this.feedback.id, this.feedback.name).catch(() => {
-                // Ignore errors.
-            });
+            if (this.feedback) {
+                this.feedbackProvider.logView(this.feedback.id, this.feedback.name).catch(() => {
+                    // Ignore errors.
+                });
+            }
         }).finally(() => {
             this.tabsReady = true;
         });
@@ -199,10 +201,12 @@ export class AddonModFeedbackIndexComponent extends CoreCourseModuleMainActivity
             // Now fill the context menu.
             this.fillContextMenu(refresh);
 
-            // Check if there are responses stored in offline.
-            return this.feedbackOffline.hasFeedbackOfflineData(this.feedback.id).then((hasOffline) => {
-                this.hasOffline = hasOffline;
-            });
+            if (this.feedback) {
+                // Check if there are responses stored in offline.
+                return this.feedbackOffline.hasFeedbackOfflineData(this.feedback.id).then((hasOffline) => {
+                    this.hasOffline = hasOffline;
+                });
+            }
         });
     }
 
diff --git a/src/assets/lang/en.json b/src/assets/lang/en.json
index c5e9e5631..20432a540 100644
--- a/src/assets/lang/en.json
+++ b/src/assets/lang/en.json
@@ -1316,7 +1316,7 @@
     "core.back": "Back",
     "core.block.blocks": "Blocks",
     "core.cancel": "Cancel",
-    "core.cannotconnect": "Cannot connect: Verify that you have correctly typed the URL and that your site uses Moodle 2.4 or later.",
+    "core.cannotconnect": "Cannot connect: Verify that you have correctly typed the URL and that your site uses Moodle 3.1 or later.",
     "core.cannotdownloadfiles": "File downloading is disabled. Please contact your site administrator.",
     "core.captureaudio": "Record audio",
     "core.capturedimage": "Taken picture.",