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 …
401 error: What is it, common causes and how to fix it
4 days ago · 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.
HTTP 401 Unauthorized: How to Fix, Prevent, Diagnose and Cause
Oct 26, 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 …
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 …
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 …
HTTP Status Code 401 Unauthorized: How to Fix & Prevent It
Aug 18, 2025 · HTTP 401 errors occur when the server can’t verify your identity due to missing or incorrect authentication credentials. Access to protected resources is denied until valid …
How to Fix the 401 Error (5 Solutions) - Kinsta®
Oct 1, 2025 · HTTP 400 status codes are encountered when there is a problem making a request. A 401 error, in particular, happens when your browser denies you access to the page you’re …
How to Fix 401 Unauthorized Error — Causes & Step-by-Step …
Learn what causes the 401 Unauthorized error and how to fix it fast. Step-by-step guide covering login issues, token errors, and server misconfigurations.
What Is a 401 Error? Causes, Fixes, and Best Practices
4 days ago · 401 errors signal invalid credentials. Fix them by checking details, clearing old data, and updating permissions.