cant sign into xbox game bar. "invalid JSON string"

You can sign in to Microsoft itself, but xbox live will show the Json string as invalid and you won't be able to sign in

You can sign in to xboxlive on your phone, but for some reason you can't do it on your pc

When i try to login to my xbox live on game pass pc it comes up with invalid JSON string how do i fix this?

Hi,

This seems like there is an issue with the installation of the Xbox App on your PC. Can you ensure you're on the latest version of the Xbox App by going to the Windows Store>Account Profile Icon>Downloads and updates. If there is no update available, can
you try to install the Xbox App (Beta) to see if you're able to use that version without any issues. This can also be found in the Windows Store by search.

Let us know!

Hello,

Check out this thread and see if the solution helps your issue: Invalid JSON string for xbox app - Microsoft Community

Essentially, there are two directories in "%userprofile%\AppData\Local\Packages\Microsoft.XboxIdentityProvider_cw5n1h2txyewy\AC\TokenBroker", Accounts and Cache. Each folder has one file in it. Delete them both, and try to log in to the xbox app again.

Thanks,

Hello, how are you? My name is Mateus. I'm an Independent Advisor and I'll be glad to help you today.

First, welcome to the Xbox community. I'm sorry you're having this problem.

I ask that before trying which solution, check if your windows are using the latest version of the system, which in this case would be 21H1, for that follow the instructions below: Go to settings>system>about. If the system is not using the latest version of windows, update it by windows update.

*If your computer updates are up to date, please try the solution below.

There are two directories in "%userprofile%\AppData\Local\Packages\Microsoft.XboxIdentityProvider_cw5n1h2txyewy\AC\TokenBroker", Accounts and Cache. Each folder has one file in it. Delete them both, and try to log in to the Xbox app again

*I hope this can help you.