Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
This has been widely reported on the 'net for over a year with Hulu. That's about how long I've been a subscriber, although I've never seen it. I just have the bottom tier Hulu subscription with ads and no live TV, though. The reports I've seen mostly mention it occurs on live TV.
I visited apple forum, and Hulu they guys still didn't find share a solution only talking they will fix as soon but after updating my Hulu app it's working perfectly that I want thanks to skytechosing.com this website share an article where guys talking about this particular error but I don't what kind of solution work for here a link of the website get to visit: https://www.skytechosting.com/how-to-fix-hulu-error-code-p-dev320/ I want an answer from your side if it's work then let me how? because this will helps to know what happening to you.