diff --git a/addressbook/js/app.ts b/addressbook/js/app.ts
index 1fb2056d17..37f90add35 100644
--- a/addressbook/js/app.ts
+++ b/addressbook/js/app.ts
@@ -1324,7 +1324,14 @@ class AddressbookApp extends EgwApp
 	 */
 	getWindowTitle()
 	{
-		return this.et2.getValueById('n_fn');
+		try
+		{
+			return this.et2.getValueById('n_fn');
+		}
+		catch(e)
+		{
+			return "";
+		}
 	}
 
 	/**