diff --git a/Views/Courses.js b/Views/Courses.js
index 30f80d6..74b49f9 100644
--- a/Views/Courses.js
+++ b/Views/Courses.js
@@ -8,28 +8,43 @@ import GlobalState from '../contexts/GlobalState.js';
 import i18n from "../i18nMessages.js";
 import AsyncStorage from '@react-native-async-storage/async-storage';
 
-const getCourses = async (profileObj) => {
-    let courses;
-    let popular;
+const emptyCoursesData = {
+    courses: [],
+    popular: [],
+    watching: [],
+};
+
+const getCourses = async (profileObj = {}) => {
+    let courses = [];
+    let popular = [];
     await API.getCourses().then((data) => {
-        courses = data.groups;
-        popular = [...data.groups].sort((a, b) => {
+        const groups = Array.isArray(data?.groups) ? data.groups : [];
+        courses = groups;
+        popular = [...groups].sort((a, b) => {
             return Object.keys(b.subscribed).length - Object.keys(a.subscribed).length;
         });
     });
     let watching = {};
     let watchingProms = [];
-    Object.keys(profileObj.data).forEach((videoId) => {
-        if (profileObj.data[videoId].profileId) {
-            let profileId = profileObj.data[videoId].profileId;
+    let viewerData = {};
+    try {
+        // Detach potential proxy/non-extensible objects before iterating keys.
+        viewerData = JSON.parse(JSON.stringify(profileObj?.data || {}));
+    } catch (error) {
+        viewerData = {};
+    }
+    Object.keys(viewerData).forEach((videoId) => {
+        const progress = viewerData[videoId];
+        if (progress?.profileId) {
+            let profileId = progress.profileId;
             watchingProms.push(API.getUserProfile(profileId).then(profile => {
                 if (!profile.isCourse)
                     return 0;
                 if (!watching[profileId])
                     watching[profileId] = { profile, progress: [], mostRecent: 0 };
-                if (watching[profileId].mostRecent < profileObj.data[videoId].ts)
-                    watching[profileId].mostRecent = profileObj.data[videoId].ts;
-                watching[profileId].progress.push(profileObj.data[videoId]);
+                if (watching[profileId].mostRecent < progress.ts)
+                    watching[profileId].mostRecent = progress.ts;
+                watching[profileId].progress.push(progress);
             }));
         }
     });
@@ -63,8 +78,9 @@ const getCoursesCache = async () => {
         if (value !== null) {
             return JSON.parse(value);
         }
+        return emptyCoursesData;
     } catch (e) {
-        return []
+        return emptyCoursesData;
     }
 }
 
@@ -80,12 +96,13 @@ const Courses = () => {
     useEffect(() => {
         let subscribed = true;
         const getData = async () => {
-            await getCoursesCache().then((r) => {
-                console.log("Courses Cache");
-                setGroups(r.courses || []);
-                setPopular(r.popular || []);
-                setWatching(r.watching || []);
-            });
+            const cached = await getCoursesCache();
+            console.log("Courses Cache");
+            if (subscribed) {
+                setGroups(Array.isArray(cached?.courses) ? cached.courses : []);
+                setPopular(Array.isArray(cached?.popular) ? cached.popular : []);
+                setWatching(Array.isArray(cached?.watching) ? cached.watching : []);
+            }
             let r = await getCourses(viewer);
             console.log("Courses Live");
             if(subscribed){