Apple TV app crashes when trying to play anything

I don't use the Apple TV app much on my MacBook Air, but around the end of 2021, I used it to keep up with new episodes of Amphibia, and it worked just fine. The last time I used the app was early December 2021. Come March 2022; I buy the next season and try to start the next episode, only to find out that I can no longer play anything on the app!

If I try to play an episode or movie that I don't have downloaded, a black window pops up and the app freezes, and if I try to play something I do have downloaded, the app freezes without even the window popping up. This has been happening for a couple of weeks now, and I've tried a couple things like changing the display resolution, restarting my computer, logging in and out of Apple TV, disabling Screen Sharing—nothing has worked. I can watch it just fine on my iPhone, so that's been my makeshift solution, but that's suboptimal.

Today, I received my only hint so far towards what could be causing the issue. I opened up the TV app to try again, and after logging back in and trying to play an episode, I was greeted with an alert saying that my device's display was incompatible with HD copyright protection. This is almost certainly inaccurate, seeing as I could watch stuff just fine last year! After that, the app went back to crashing as normal when I tried to play things.

So, with all of that out of the way, I come to the help forums... what could be causing this, and how might I fix it?