Join Date: Jan 2008
Location: NYC, NJ, Long Island
Programs: DL DM, 1.6MM, UA Silver, NEXUS, SkyClub & AdmiralsClub Lifetime, Bonvoy Titanium
Posts: 6,652
It's probably corrupted some other resident module
You can use the mobile site for basic stuff like check in and send the BP's to your phone. It's not a solution but a temporary work around while you decide what to do.
go to m.delta.com in your browser. you can always go to the full html site if you need additional functionality.