Groupon site is down!

When I try to reach Groupon.com, I get: 

Oops! Internal Error

Something went wrong with the page you requested. Try refreshing. If that doesn't work, click the button below to browse all of our amazing deals.

When I click that button below, I still get the same error page. Error 403,  This issue has been going on all day, both in Chrome and IE.  Can get to the site via mobile app.