@red_Thanks bro, you are right. Disabling HTTP/2 solved the problem for now. This issue was introduced by Shield Experience Upgrade 9.0 and Second HotFix (33.1.0.264) still doesn't fix the issue. The affected range includes Kodi 18.9-20 and may include lower Kodi versions, I'm not sure. Even external calls to HTTPS streams don't play, so this has nothing to do with the Kodi Emby add-on. It may be related to a specific Emby server configuration though, maybe the server can block HTTP/2 to