Thanks. I reinstalled the app, cleared data and cache, but it was still unable to stream any content. Then I noticed the chromecast was acting weird, it was lagging, it was getting very, very slow connection speed, like if it was applying updates or running maintenance, I don’t know for sure. I checked again next day, and now is is working as expected.
If not for the fact that I really like the form factor of this device, I would ditch it.
Otoh, the logs are in the post, maybe your client is not rendering > markdown
< properly.
I’ve found that as well with some files. At first I thought the issue was with the jellyfin instance had not enough capabilities, but after trying the same file with its subtitles, it worked on any other client: flatpak, web, and regular android. So for me it is the chromecast/androidtv device, so I am now looking what to replace it with