Won't log into pandora

Are you able to login? If you can login but you were logged out it may just be a minor glitch/security feature. Put it this way. I have an Instagram account and they log me out periodically. No one else goes on my account, no one reads my messages, and no one posts anything but me.

Pandora accounts follow the account, not the device, so you will be able to use your Pandora account on any computer or device you own.
Choose the device you are using below for instructions:
Computer
iOS
Android

go into the log in page - hit "forgot user ID" - they will email you a new one or email you a link to pick a new one - use at least 8 characters. Then go back to log in enter & enter your new user name. Try your old password - if that doesn't work, hit "forgot password" & they'll let you reset.

Check the Denon website. There is a notice for Pandora users. Pandora changed something and Denon products are blocked as of 11/30. They state that they are working on a fix and to check back after 12/6 for the update.

direct from Denons website "

Why can't I access Pandora on my Denon networked product?

Please be advised that Pandora has recently altered certain connection requirements which have temporarily blocked our products from connecting to the Pandora service. Our Engineering Dept. is currently working hard to correct this and will have a firmware update available as soon as possible via the internet to resolve this issue. This should not affect your product's ability to receive other music streaming services. Please visit our website for firmware update schedule information after December 6th.
We sincerely apologize for any inconvenience that Pandora's alteration has caused.

Just got this unit and had a similar issue, but mine was getting the iphone to play at all. On advice of the sales rep I bought the kit required to view movies with your iphone. The kit plug into the back of your radio using rca jacks and then utilizes the usb port. I can now use my iphone to play audio, movies and utilize i heart radio.

Are you able to get to the desktop in safe mode?
Repeatedly press F8 on startup and choose to boot to safe mode in the options window.