diff --git a/app/src/main/java/org/openedx/app/data/storage/PreferencesManager.kt b/app/src/main/java/org/openedx/app/data/storage/PreferencesManager.kt
index ae36968d2..efd2d16b2 100644
--- a/app/src/main/java/org/openedx/app/data/storage/PreferencesManager.kt
+++ b/app/src/main/java/org/openedx/app/data/storage/PreferencesManager.kt
@@ -145,10 +145,12 @@ class PreferencesManager(context: Context) : CorePreferences, ProfilePreferences
             saveString(APP_CONFIG, appConfigJson)
         }
         get() {
-            val appConfigString = getString(APP_CONFIG)
+            val appConfigString = getString(APP_CONFIG, getDefaultAppConfig())
             return Gson().fromJson(appConfigString, AppConfig::class.java)
         }
 
+    private fun getDefaultAppConfig() = Gson().toJson(AppConfig())
+
     override var lastWhatsNewVersion: String
         set(value) {
             saveString(LAST_WHATS_NEW_VERSION, value)
diff --git a/core/src/main/java/org/openedx/core/domain/model/AppConfig.kt b/core/src/main/java/org/openedx/core/domain/model/AppConfig.kt
index 596fd0619..97750957f 100644
--- a/core/src/main/java/org/openedx/core/domain/model/AppConfig.kt
+++ b/core/src/main/java/org/openedx/core/domain/model/AppConfig.kt
@@ -3,12 +3,12 @@ package org.openedx.core.domain.model
 import java.io.Serializable
 
 data class AppConfig(
-    val courseDatesCalendarSync: CourseDatesCalendarSync,
+    val courseDatesCalendarSync: CourseDatesCalendarSync = CourseDatesCalendarSync(),
 ) : Serializable
 
 data class CourseDatesCalendarSync(
-    val isEnabled: Boolean,
-    val isSelfPacedEnabled: Boolean,
-    val isInstructorPacedEnabled: Boolean,
-    val isDeepLinkEnabled: Boolean,
+    val isEnabled: Boolean = false,
+    val isSelfPacedEnabled: Boolean = false,
+    val isInstructorPacedEnabled: Boolean = false,
+    val isDeepLinkEnabled: Boolean = false,
 ) : Serializable