Kestrel rejects the h2c upgrade preface; Caddy surfaced that as a 502 per request while the backend answered 200 on plain HTTP/1.1 from Caddy's network. Contrast recorded: Plex PMS needs the TLS transport, Jellyfin needs none.
Kestrel rejects the h2c upgrade preface; Caddy surfaced that as a 502 per request while the backend answered 200 on plain HTTP/1.1 from Caddy's network. Contrast recorded: Plex PMS needs the TLS transport, Jellyfin needs none.