500 Error with sandbox Users v2

[API_User]

Hello, I have been attempting to mess with the sandbox and create.

The two things I have done (using Postman) are get a token and create a user.
I have been putting the Bearer Token in Auth and receive this, with a 500 error:

[
    {
        "errorCode": "EQ-2021101",
        "errorMessage": "The server has encountered an unexpected error. We apologize for the inconvenience. Please try again later.",
        "correlationId": "230718201317567"
    }
]

Let me know if you need more information, as I am lost on where to go next.