I've been dealing with this same HDCP issue (1559) for well over a year. Prior to that, I was able to record and watch 4K on my Hopper 3. Then something happened, I assume a software update, and from that point forward I can watch for perhaps 30 seconds and then the error screen appears. I called support several times and always got the same runaround... reset receiver, check cables, and so on. I finally took a vacation day a couple weeks ago so I could call one last time in an attempt to get to the bottom of it. Sorry to say, I wasted one of my valuable vacation days. In the end, after perhaps 45 minutes on the phone, the tech checked with an upper level tech and the response was, "it's a known issue and they are working on it". At this point, I don't think anyone is working on it and am not expecting a solution.
For what it's worth, I have fully compliant 4K components, HDMI cables, and a fiber optic HDMI cable going from my Marantz receiver to my BenQ HT3550 projector. I have a PS5 (got lucky), a Sony 4K UHD Blu-ray player, a Nvidia Shield TV Pro, and a Roku 4K streaming stick which all play 4K flawlessly through my projector. Only the Hopper 3 won't play 4K like it should.
I only have relatively slow DSL internet and am on the waiting list for Starlink internet. I am so looking forward to fast internet with Starlink. That will open up multiple TV programming possibilities if you know what I mean. Dish has done nothing to make me feel like a valued customer even though I've been with them for over 12 years.