Index: sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml
===================================================================
diff -u -rbf9223700613ced6c377f3e3a7b4de8367c30474 -rb12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd
--- sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml	(.../SettingsDeviceRegistration.qml)	(revision bf9223700613ced6c377f3e3a7b4de8367c30474)
+++ sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml	(.../SettingsDeviceRegistration.qml)	(revision b12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd)
@@ -148,7 +148,7 @@
             let mHasNetworkConnection   = (_ipAddress_eth0.isValid || _ipAddress_wlan0.isValid)
             if ( ! mHasNetworkConnection) { _root.notificationText = qsTr("No Network Connection"); return }
 
-            let mHasSerials             = ( _serial_TD != "" && _serial_DD != "")
+            let mHasSerials             = ( _serial_TD !== "" && _serial_DD !== "")
             if ( ! mHasSerials          ) { _root.notificationText = qsTr("No device Serial"     ); return }
             vCloudSync              .doRegister  ()
         } // start device registration