HTTP Error Codes - 401 Unauthorized
A 401 status code indicates that the request could not be authenticated. This may be caused by any one of these conditions:
- No credentials supplied to Basic Authentication, and no Authorization Ticket cookie sent with the request.
- An invalid username or password was supplied to Basic Authentication.
- An expired or invalid Authorization Ticket cookie sent with the request.
The typical course of action would be to include Basic Authorization credentials and resend the request.