Can connect to Streamyfin but not Jellyfin mobile app

[nothingveryobvious]

I'm located in the US and I have a user in Peru. She can connect to Streamyfin at https://jellyfin.mydomain.com but not Jellyfin mobile app. Any idea why?

Thanks!

[Winifred Benedict]

I'm located in the US and I have a user in Peru. She can connect to Streamyfin at https://jellyfin.mydomain.com but not Jellyfin mobile app. Any idea why?

Thanks!  Incredibox

I’ve run into a similar issue before — where a remote user could access Jellyfin via a browser (like Streamyfin), but not through the official Jellyfin mobile app. Here are a few things that helped in my case:

SSL certificate: The Jellyfin app can be picky with custom or self-signed certificates. Even if the site works on a browser, the app may reject it unless you’re using a trusted CA like Let’s Encrypt.

Reverse proxy settings: If you're using Nginx or Apache, double-check that you're forwarding necessary headers (like X-Real-IP, Host, etc.) and not stripping anything Jellyfin needs.

DNS or ISP blocking: Sometimes users from specific regions (like Peru) may have DNS or firewall issues. You might try using a public DNS (e.g., 1.1.1.1) on her phone to see if that helps.

Jellyfin version compatibility: Ensure that both the server and app are up to date. For example, some features in Jellyfin 10.9+ require the mobile app to be 2.6+ for full compatibility.

What worked for me: Have your user manually enter the server address in the Jellyfin app as https://jellyfin.mydomain.com (no /web) and make sure "Remote Access" is enabled on your server. You can also test connectivity using the Jellyfin desktop app or a browser on mobile as a fallback.

Hope this helps! Let me know if you need help checking the reverse proxy config — I’ve been through that rabbit hole too.