Summary
A 401 Unauthorized response status code indicates that the client request has not been completed because it lacks valid authentication credentials for the requested resource.
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The server generating a 401 response must send a WWW-Authenticate header field containing at least one challenge applicable to the target resource.
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If the 401 response contains the same challenge as the prior response, and the user agent has already attempted authentication at least once, then the enclosed representation should be presented to the user.
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Summary
HTTP Status Code 401 indicates that a request has not been applied because it lacks valid authentication credentials for the target resource. The server generating a 401 response must send a WWW-Authenticate header field containing at least one challenge applicable to the target resource. If the 401 response contains the same challenge as the prior response, and the user agent has already attempted authentication at least once, then the enclosed representation should be presented to the user.
401 Unauthorized — httpstatuses.com
httpstatuses.com
Each Status-Code is described below, including a description of which method(s) it can follow and any metainformation required in the response.
HTTP/1.1: Status Code Definitions
w3.org
The 401 Unauthorized error is triggered by unauthenticated requests made to a WordPress ... Although rare, a DNS error may result in the 401 HTTP status code ...
401 Error: 5 Ways to Troubleshoot and Fix It
hostinger.com
