diff --git a/SWADroid/src/main/java/es/ugr/swad/swadroid/SWADMain.java b/SWADroid/src/main/java/es/ugr/swad/swadroid/SWADMain.java
index 7bdf4f2c..a18ed1d1 100644
--- a/SWADroid/src/main/java/es/ugr/swad/swadroid/SWADMain.java
+++ b/SWADroid/src/main/java/es/ugr/swad/swadroid/SWADMain.java
@@ -184,6 +184,9 @@ public class SWADMain extends MenuExpandableListActivity {
         initializeMainViews();
 
         try {
+            // Initialize WorkManager
+            workManager = WorkManager.getInstance(this);
+
             // Create Notifications channel
             if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
                 AlertNotificationFactory.createNotificationChanel(this);
@@ -212,8 +215,6 @@ public class SWADMain extends MenuExpandableListActivity {
 
             View view = findViewById(R.id.main_view);
             setOnApplyWindowInsetsListener(view);
-
-            workManager = WorkManager.getInstance(this);
         } catch (Exception ex) {
             error(ex.getMessage(), ex);
         }
diff --git a/SWADroid/src/main/java/es/ugr/swad/swadroid/modules/notifications/Notifications.java b/SWADroid/src/main/java/es/ugr/swad/swadroid/modules/notifications/Notifications.java
index 238da8fd..cbf436ae 100644
--- a/SWADroid/src/main/java/es/ugr/swad/swadroid/modules/notifications/Notifications.java
+++ b/SWADroid/src/main/java/es/ugr/swad/swadroid/modules/notifications/Notifications.java
@@ -271,6 +271,9 @@ public class Notifications extends Module implements
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {		
 		super.onCreate(savedInstanceState);
+
+		workManager = WorkManager.getInstance(this);
+
 		setContentView(R.layout.expandablelist_items_pulltorefresh);
 
 		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
@@ -318,8 +321,6 @@ public class Notifications extends Module implements
 
 		View view = findViewById(R.id.expandablelist_items_pulltorefresh);
 		setOnApplyWindowInsetsListener(view);
-
-		workManager = WorkManager.getInstance(this);
 	}
 
 	/**
diff --git a/SWADroid/src/main/java/es/ugr/swad/swadroid/preferences/PreferencesActivity.java b/SWADroid/src/main/java/es/ugr/swad/swadroid/preferences/PreferencesActivity.java
index 652763f9..343e5751 100644
--- a/SWADroid/src/main/java/es/ugr/swad/swadroid/preferences/PreferencesActivity.java
+++ b/SWADroid/src/main/java/es/ugr/swad/swadroid/preferences/PreferencesActivity.java
@@ -149,6 +149,8 @@ public class PreferencesActivity extends PreferenceActivity implements OnPrefere
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        workManager = WorkManager.getInstance(ctx);
         
         //Restore preferences        
         getPreferenceManager().setSharedPreferencesName(Preferences.PREFS_NAME);
@@ -238,8 +240,6 @@ public class PreferencesActivity extends PreferenceActivity implements OnPrefere
         } catch (PackageManager.NameNotFoundException ex) {
             error(ex.getMessage(), ex);
         }
-
-        workManager = WorkManager.getInstance(ctx);
     }
 
     /* (non-Javadoc)