This is a very common scenario which occurs usually when streaming games on some platform or broadcasting directly to a channel. This issue is solved easily given that the game you are trying to stream provides enough permissions to do so. Before trying any of the solutions
1. Reset the Windows Game Bar
Conflicting settings of the Game Bar/Mixer can cause the broadcasting error. Since Mixer is part of Windows Game Bar, resetting Game Bar will reset Mixer’s settings as well and thus may solve the broadcasting problem. Do note that by performing this action, all the current settings of your Game Bar and will be erased. Personal preferences might also be lost.
2. Allow Windows To Run the Apps in The Background
Whenever Windows detects that you are playing a game, it will turn off some applications (that are not allowed to run in the background) for a smoother user experience. If the global setting of running the background apps is turned off, then the user will not be able to broadcast via Mixer (since it also considers the Mixer as a background application). This issue doesn’t happen with people having updated Windows.
3. Renew Your Stream Key
Microsoft has implemented a Streamer Review for broadcasting via Mixer to improve the validation and monitoring of new streamers. Streamers are required to login with their Microsoft account at the Mixer website to enable additional screening of their accounts. After that, streamers will have to wait for 24-hour before getting a new stream key and then they can start streaming. Renewing your streaming key may solve the problem. Note: This action might put your current streaming key on hold. If the error message still persists even after performing all the above actions, consider relogging into your Microsoft Account on your Windows. This will probably erase all your preferences. You can also try creating a new local account and checking out the behaviour of Mixin there.
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