I updated Tunarr and Jellyfin docker containers after having last updated them in August or earlier.
Since then, streaming now fails due to what appears to be an authentication issue with Jellyfin.
I am on Tunarr 0.20.6 and Jellyfin 10.11.5. Configured to connect via Jellyfin API key. Tunarr shows connection to Jellyfin is healthy. I tried creating and using a second Jellyfin api key but it didn't help.
Relevant-ish looking Jellyfin logs: