HostAuthorizationNotFound when loading page and specifically when it tries to access {organization}.visualstudio.com/_apis/WebPlatformAuth/SessionToken

[wadechandler]

I'm seeing the following response in the Chrome developer tools network; the server code is 500; this is returned as the body.

{"$id":"1","innerException":null,"message":"HostAuthorizationNotFound","typeName":"Microsoft.VisualStudio.Services.DelegatedAuthorization.SessionTokenCreateException, Microsoft.VisualStudio.Services.WebApi","typeKey":"SessionTokenCreateException","errorCode":0,"eventId":3000}