In all games I get an error

Hello Stella, my name is Khaji I am the independent advisor and I will be happy to help you today.

I am sorry you are going through this.

Try following these steps to fix the problem:

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

- Disconnect the power cord from the console and wait 30 seconds.

- Reconnect the power cord to your console and turn it on as usual.

- Check to see if the problem persists. If so, reset the console to factory settings while keeping your games and applications. Here's how to do it:

- Go to Settings > System Information > the console > Reset the console > Reset and keep games and applications.

Best regards, Khaji

https://support.xbox.com/en-US/xbox-one/errors/error-code-80A40008

I am not familiar with routers. I am afraid to cause my wireless network to be destroyed

Why the problem appear in the xbox one. all other devices (PC, laptops) are working great with this router

See if any of this possible solutions in this
troubleshooter can fix your issue.

Hi There

I have found some possible solutions which you can try:

Error 80A40008 occurs due to a connectivity or account issue on Xbox One

You see the following error message when you try to sign in to your Xbox profile or recover your profile on your Xbox One console:

There was a problem and we couldn't continue

0x80A40008

This may mean one of the following things:

• There's an Xbox Live connectivity issue.
• You entered the wrong Microsoft account information (email address or password).
• There's an issue with your Microsoft account.
• You have too many accounts saved to your Xbox One console.

Solutions

To solve this problem, try the following solutions.

Solution 1: Check the Xbox Live service status

If you see any alerts here, wait until the service is up and running and try again:


Xbox Live Core Services: up
and running
6/25/2019, 8:21:32 AM


Solution 2: Test your Xbox Live connection

1. Press the Xbox button to open the guide.
2. Select Settings.
3. Select All Settings.
4. Select Network.
5. Select Network Settings.
6. Scroll right and select Test network connection.

If you get the "Everything is good" message, try to sign in to your Xbox profile. If you don't get this message, try the Xbox One Network
Connection Error Solution.

Solution 3: Remove and re-add your account

1. Remove your account from the console. Here’s how:
   1. Press the Xbox button to open the guide.
   2. Select Settings.
   3. Select All Settings.
   4. Under Account, select Remove accounts.
   5. Scroll right and highlight your account to select it.
   6. Select Remove.
2. Restart your console. Here's how:
   1. Press the Xbox button to open the guide.
   2. Select Settings.
   3. Select Restart console.
   4. Select Yes to confirm.
      Note If you're unable to access the guide or if the console appears to be frozen, press and hold the Xbox button on the console for 10 seconds, until the console turns off. After the console shuts down, touch the Xbox button
      on the console again to restart.
      

1. Re-add your account to the console. Here's how:
   1. Press the Xbox button to open the guide and select Sign in.
   2. Scroll down to Manage accounts.
   3. Select Add new.
   4. Enter your Microsoft account email address and password, and then select Enter.
   5. Verify the privacy settings you've set for your account. These apply to any Xbox One console that you sign in to.
   6. Select Next.
   7. On the Choose a color screen, select the color for your Home screen to differentiate between you and others using this console.
   8. Select Next.
   9. When you're reminded of the gamerpic that's associated with your profile, select Next.
   10. Select your sign-in preferences.

Solution 4: Remove all accounts on the console
If you have a large number of accounts saved to your console, remove all of them and restart the console before re-adding your account as outlined in Solution 3 above.

If, after removing all accounts and re-adding yours, you still cannot sign in, you will need to restore factory settings on the console. Please read and follow the instructions
found here very carefully.

Warning Restoring your console to the factory default settings erases all accounts, apps, games, saved games, and settings. Anything not synchronized with Xbox Live will be lost. Your console syncs with Xbox Live automatically when it is
connected with the service.

I hope this helps

Have you tried doing a factory reset on your router? Not sure it will help but it is an option.

Reset the Dlink DSL-225
While the router remains on, take a straightened paperclip and press down on the reset button for about 10 seconds.