Auth0 400 Bad Request Callback error on Login

Hello, The users of my app are facing an error while logging in with a simple email and password login. They got an HTTP 400 Bad Request error, after entering their credentials and clicking on login. We are using NextJS-Auth0 sdk with the required settings from its quick start.

I have checked the logs on monitoring and got a success message from all:

I have setup an action of creating a user on Playfab when user registers on this app:

This is affecting a major crunch of users and does not allow them to login which results in bad user experience and affecting my sales.

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This is my package.json file: