"You must enter a question or subject (in English)" Wierd Error on MSDN Online Concierge

Try this if you have an MSDN subscription with access to Online Concierge. Login to MSDN Subscriptions, choose Manage My Suscriptions and on the Manage subscription page, click on the Online Concierge Chat. You are taken to the MSDN Online Concierge page. Enter any query in English and click the Chat button. And you get an error message saying "You must enter a question or subject (in English)" See a screenshot of the error message here. After some experimentation I found out that this occurs when the length of the query exceeds some arbitrary limit. But showing an unrelated error message really doesn't help in identifying the problem.