Xbox one shuts down while playing Fortnite

Hello, my name is Oskayra and I will be happy to help you.

The ideal in this case would be to apply your warranty, although first it would be good to try the following:

1. With the Xbox on, press the power button on the front of the console for 10 seconds until it turns off completely.

2. Unplug the power cord from the console and wait 30 seconds.

3. Reconnect the power cable to your console and turn it on normally.

4. Check if the issue persists and if so, try resetting the console to its factory settings.

To reset your console to its factory settings you must do the following:

Go to Settings > System > Console Info > Reset Console > Reset and Keep Games and Apps.

This way your console will be reconfigured and you will have to add your account again. No games or apps will be deleted, nor will you lose game progress as they are saved to the Xbox Cloud.

5. If the same happens after all of the above, please apply the console warranty through the following website:

https://account.microsoft.com/devices/

In case your console does not appear, you need to register it (with the "Add Device" button on the top right corner) and then you need to click on "Information and Support" on your console and then select "Start Order", finally you should complete the information requested.

If you want detailed information about the repair service system procedure, please click the following link

https://support.xbox.com/help/hardware-network/warranty-service/getting-your-product-serviced

I hope this information has been useful to you.

I found a fix! Blow on the top vent of you xbox one for about 2 minutes, it worked for me.

pode ser algo relacionado a fonte

The power supply can also collect dust on the sides I would get some compressed air and try blowing any dust out if its over heating.

Are you a part of the Xbox Insider program by any chance? This has been an issue in several of the builds and continues to be an issue as they are having difficulty figuring out the cause and fix. If so, please make sure that you are reporting the issues
using the Report a Problem tool on your console as soon as you power it back on.