Why does Hulu stop play saying other device is using Hulu?

I am watching an old TV show and periodically play back will stop, and a white on black screen message says only one device can be running Hulu at a time. The only option is to click to go to Devices on my account screen where THERE ARE NO DEVICES LISTED! I then use the back arrow to get the playback screen and resume watching for it to happen 5 minutes later. Why? How to fix/avoid? Thanx in advance.

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Clarification Request
Hulu or Hulu Plus?

It's possible the TV needs updating but here we are and little to work with.

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So you are running only one device but...

they won't let you? Maybe you have to register all devices even though only one can be use at a time (I am just guessing).

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Good plan.

I'd unregister them all and add this one on it's own.

There was some chatter about this happening on some ISPs. But that's a long shot.

The OP needs to clarify a little. Hulu doesn't run on TVs yet. It's Hulu Plus or the Hulu Plus app. I know folk don't want to get technical but it is technical. Let's try to get the details straight here.

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