I faced the similar issue as well. I tried with Unknown in the last name field and it worked. That's when the application status was changed to DIP. No worry, as mpreetsingh said, probably they are working on your application. It'll be a blessing in disguise.Yes I don't have Last name so I used N/a all these days but today nothing is working. I tried with unknown also but no success. I had logged to check status daily till 29th and had never faced issue. Don't know why this is happening today