Repro of the AuthenticationStateProvider "GetAuthenticationStateAsync was called before SetAuthenticationState." error
- Run the app and click the button to create an authentication cookie via a Razor page.
- You are then redirected back to Blazor where two things occur:
- An injected service within the Blazor component reads a claim from the cookie
- An image controller attempts to read the same claim via the same service before returning an image, but fails with the above error.
The injected service uses AuthenticationStateProvider which appears to cause the error.