Roku: Episode won't play, even from a different server

Server Version#: 1.43.2.10687
Player Version#: 9.8 Build 11

I’m having a strange issue I’ve never encountered before. On Roku (and only Roku), one particular episode of a show (Dark S02E08) won’t play from my PMS. I just get a spinning loading screen but no % shows up inside and it just hangs there.

The weird thing is, this also happens if I try to play the same episode from my friend’s server, which I also have access to. His is a different version of the file (and I also tried a different file on my server), so it seems to be an issue with that particular episode (not any particular file).

I was able to watch the episode on another device but I’m curious if anyone has had this issue before or has any ideas for how to fix it. Thanks!