Something is broken

Lower the quality. Open the gear icon during playback and pick 1080p or 720p instead of Auto or Maximum. This fixes it the vast majority of the time.

If that does not help: move closer to the router or switch to a cable, stop other large downloads in the house, and check whether someone else is streaming at the same time. On mobile data, a weak signal will do this no matter what quality you pick.

That is the simultaneous stream limit, not a fault. By default an account plays one thing at a time, shared by everyone using it — so if someone else is already watching, your playback will not start. It does not sign anyone out and it does not interrupt them. Wait until they finish, or add streams — see Live TV & motorsport for how the tiers work.

Your device cannot decode that video format. Try a different app — the official Jellyfin app and Streamyfin handle more formats than a browser does. In a browser, try Chrome rather than Firefox or Safari. If it happens on one specific title only, report it with the ⚠ button on that title and choose Video — the file itself may need re-encoding.

Usually an audio format your device cannot handle, often surround sound on a device with stereo speakers. During playback, open the speaker icon and choose a different audio track if one exists. On a computer connected by HDMI, also check that the TV is selected as the output device. If the title genuinely has no working audio, report it with the ⚠ button and choose Audio.

Start playback, bring up the controls, and click the speech-bubble icon — subtitles are off unless you turn them on. If the language you want is not listed, that file does not contain it.

You can set a default language once so you never have to do this again: see Your account & settings. If a title is missing subtitles you need, report it with the ⚠ button next to Play and choose Subtitles — a track can usually be added the same day.

The subtitle file was made for a different cut of the film. Some apps let you shift subtitle timing in the playback settings. If not, report it with the ⚠ button and choose Subtitles — replacing a badly-synced track is quick.

Your connection is coming through a VPN, Tor or a datacentre proxy, all of which are deliberately blocked. Disconnect the VPN and reload. Hotel, office and university networks sometimes route through proxies you did not choose — in that case try mobile data instead. If you are certain you are on a normal home connection, open a ticket and include your public IP address.

You are not supposed to. Wizarr is only for redeeming your invitation once, when the account is first created. It is not a login page and it is not where you watch. Go to jellyfin.karafa.net instead and sign in there with the username and password you chose. This is the single most common misunderstanding on the whole server.

In order of likelihood: a VPN is running; the server address has a typo (it is https://jellyfin.karafa.net with nothing after .net); your internet is down; or the server really is offline — check the status page. Test by opening jellyfin.karafa.net in the device's browser: if that works and the app does not, delete and re-enter the address in the app.

Capital letters matter, and phone keyboards love to capitalise the first letter of a username automatically — check that first. Confirm the password works in a browser before blaming the app. If you have genuinely forgotten it, there is no self-service reset: open a ticket at the help desk and we will reset it manually, usually the same day.

A filter list is probably blocking a domain the site needs. Send us the address of the page and we will allow it. To confirm that is the cause, temporarily set DNS back to automatic — the undo section takes thirty seconds. Note that captive portals on hotel and airport Wi-Fi always need encrypted DNS turned off while you sign in.

This does happen — a disk failure in the past has taken content with it, and space is tight enough that things occasionally get rotated out. The fix is the same either way: request it again and the automation will fetch it fresh, usually within hours.

Try both the Slovak and the original title — the library's metadata is mostly Slovak, but not universally, so a film may be filed under either. Searching for an actor or director often finds it faster than guessing the exact wording.

No good copy has been found yet. This is normal for films still in cinemas, and for very old or obscure titles. Give it a few days; if nothing changes, open a ticket with the title and we will look manually. Requesting it repeatedly does not speed anything up.

Brand-new accounts often show an empty home page until you have watched something. Open a library from the top menu and it will be full. If an entire library is missing, permissions may not have been set for your account — tell us and we will fix it.

Report it from inside Jellyfin — no need for a second site. Open the title and click the warning triangle (⚠) next to the Play button, pick Video, Audio, Subtitles or Other, and submit. That flags the exact file, which is far easier to act on than a message saying "the Batman one is broken". Full walkthrough.