Cast Button find no device

[findbaz]

I have/had the same problem.
I discovered that it has to do with updating the DLNA plugin. (7.0.0.0 from March 12, 2025) I uninstalled the plugin and went back to version 6.0.0.0. Now the cast button works again for me.
I have the automatic update in the config set to false, otherwise Jellyfin will switch back to version 7 on the next reboot.

Hope the hint can help.
Greetings Tom

..\jellyfin\config\plugins\DLNA_6.0.0.0\meta.json

(Jellyfin 10.10.6, Synology, Portainer, Docker)

Thanks for this, really helped me out. I have Jellyfin installed via flatpak and spent an hour looking for that file you mentioned. Looks like flatpak does its on thing with installs. (time to get rid of that). This update came out 1 day after I migrated to Linux from Windows and it took me 6 hours to do that (fixing metadata) then the next morning BOOM no streaming, was starting to panic a bit.