401 Unauthorized - HTTP | MDN - MDN Web Docs
Jul 4, 2025 · The HTTP 401 Unauthorized client error response status code indicates that a request was not successful because it lacks valid authentication credentials for the requested …
How to Fix a 401 Unauthorized Error? - GeeksforGeeks
Jul 12, 2025 · The "401 Unauthorized Error" is a standard HTTP response status code that indicates that a request sent to a server cannot be completed because it lacks valid …
What Is a 401 Error? How to Fix 401 Unauthorized Status Codes
Nov 11, 2024 · Not sure what a 401 error is? Learn what 401 Unauthorized errors are, their causes, and the steps you can take to resolve and prevent them.
401 error: What is it, common causes and how to fix it
Dec 3, 2025 · Getting a 401 error? Learn what it is, why it appears, and how you can fix it. Get clear solutions for users and website owners to prevent access issues.
What is HTTP 401 Error and How to Fix it - DEV Community
Dec 20, 2024 · What is HTTP 401 Error? The HTTP 401 Unauthorized error is a status code 401 returned by the server when authentication fails. It means the server has received your …
HTTP 401 Unauthorized: How to Fix, Prevent, Diagnose and Cause
Nov 6, 2025 · HTTP 401, often referred to as “Unauthorized Error”, is an HTTP status code indicating that the client's request lacks valid authentication credentials. In simpler terms, it …
How to Fix the 401 Error (5 Solutions) - Kinsta®
Oct 1, 2025 · The 401 error is commonly associated with invalid authentication credentials. Find out more about the causes and fixes.
401 unauthorized: why?how to fix it? - DebugBar
Nov 26, 2024 · When the 401 Unauthorized response status code is received by a web application, it means that the client request hasn’t been completed because it lacks valid …
What is “401 Error Unauthorized Access” and How to Fix it?
Sep 2, 2025 · Occasionally, when you try to access a web page, you may stumble across the “401 Error Unauthorized Access”. Like other HTTP errors, there could be various causes. This …
401 Unauthorized - HTTP status code explained
Aug 2, 2023 · HTTP response status code 401 Unauthorized is a client error that is returned by the server to indicate that the HTTP request has to be authenticated, and that appropriate …