Chromecast Not Supported? 14 Ways to Fix It

There are several reasons for this error and none are your fault

The Chromecast 'source not supported' error might display in Chrome if the browser or Chromecast can't identify the source content you're trying to cast.

There are several possible reasons for this error, and so there are a number of possible fixes. It could be the browser experiencing a hiccup, an issue with the Chromecast itself or your network, or a number of other things from incompatible software to disabled settings.

Chromecast source not supported error message

These steps are relevant for users with a Chromecast plugged in to a TV or projector, as well as devices with Chromecast built-in.

How to Fix Chromecast 'Source Not Supported' Error

Here's what to do when you see this error in Chrome. These steps should work no matter what you're trying to cast, whether it's a streaming video, a local file, or the whole desktop or browser tab. Remember to test to see if the solution worked for you before moving on to the next step.

  1. Unplug the Chromecast, or the TV if it's built-in to it, for a few seconds and then plug it back in.

    Despite seeming like too simple of a solution, a restart is the easiest first step to try and could be all that's necessary to fix the error.

  2. Update Chrome if it's outdated. The latest version includes bug fixes and other improvements that could be the fix for the 'source not supported' error. Many people have found relief from this error by simply keeping Chrome updated.

    Relaunch Chrome prompt
  3. Update Chromecast if one is available. The restart in step 1 might be enough to trigger the update, but if not, follow that link for directions. An update could be available to address the error.

    If you have an Android TV, now is a good time to check for updates. Google provides instructions on performing Android TV updates.

    Some TV's might appear to have Chromecast built-in, when in reality they're only compatible with certain websites, such as YouTube or Netflix, which make themselves available to our TV via the DIAL protocol. Attempting to cast something else, such as your desktop or a browser tab, will show the 'source not supported' error. Check Google's Chromecast built-in page to see if your TV actually supports Chromecast.

  4. Restart your computer and then restart your router. This is one of the last general troubleshooting tips which apply to any PC or network-related problem.

  5. Go to chrome://flags/ in Chrome. Search for these and choose Enabled from the menu next to them:

    • Connect to Cast devices on all IP addresses
    • Cast Media Route Provider
    Cast Media Route Provider Chrome flag enabled
  6. Temporarily disable these settings which could be interfering with your computer's ability to properly communicate with the Chromecast:

    • VPN
    • Ad-blocking extensions or software
    • Firewall
    • Antivirus software

    Some people with this error only had luck when these items were completely uninstalled. If just shutting down the VPN, for example, doesn't fix the Chromecast 'source not supported' error, do a full uninstall.

  7. Disable all your Chrome extensions. If the error disappears after doing this, re-enable the extensions one by one, testing after each one to ensure you don't see the Chromecast 'source not supported' error. You might have to permanently delete one of your extensions if it's the culprit.

  8. If you have an Android TV, press Home on the remote, go into the settings, choose Apps under TV, and then find Google Cast Receiver under System apps.

    In there, first try toggling the option off and then back on. If that doesn't fix the error, return to this section to clear out the cache.

  9. If Chromecast functionality is built-in to your TV, there might be a time/date-related issue which needs to be resolved in order to correct the 'source not supported' error.

    Find the date and time option in your TV's settings and set it to be determined automatically. Select the Use network time option (it might be called something similar).

  10. Reset the Chromecast back to its factory defaults. This will completely erase its memory and settings, so you'll need to set it up as a new device afterward.

  11. Reset your router. This is similar to resetting the Chromecast but applies to your router. Everything will be restored to its default state, so the Wi-Fi network will need to be set up again.

    This is different from the restart step earlier. A reset erases customizations and puts the router back to its factory defaults, while a restart is just a simple shutdown and startup.

  12. Change your Wi-Fi network from public to private if you're on Windows. Doing so makes your computer discoverable to other devices on your network, which could fix the error.

  13. Try a different browser such as Edge or Chrome Canary (meant for developers). Some users have had luck using something other than Chrome. At this point, after resetting all the hardware and ensuring that everything is updated, the next easiest solution you're left with is leaving Chrome for another browser.

    In fact, for some people, using Edge to connect to the Chromecast might, for whatever reason, trigger or wake up the connection from your computer to the Chromecast, thus fixing the error in Chrome. It's worth a shot.

    Chromecast available message in Edge
    Chromecast available in Edge.
  14. Reinstall your operating system. Yes, this is a huge step but could be the fix if the problem isn't with your TV or Chromecast. If your operating system is to blame, a fresh installation will almost always fix the error.

    This will erase everything on your computer, unless your reset method includes an option to keep your personal files (such as Reset This PC in 10/8). Remember that this will only fix the Chromecast error if the problem lies with your computer.

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