HTTP status code 401 (Unauthorized) means: You need to log in: authentication is required and was missing or invalid. Yes, a client error: the request was wrong or not allowed. Usually the link, the login or the data sent needs to change.
Is it an error?
Yes, a client error: the request was wrong or not allowed. Usually the link, the login or the data sent needs to change.
Common causes
- Missing, expired or wrong login credentials
If you are visiting the site
- Log in again or check your username and password
- Clear the browser's cache and cookies for this site
If you run the website
- Return a WWW-Authenticate header and check how users log in
- Check the server error logs at the time of the error
Frequently asked questions
What does HTTP 401 mean?
HTTP status code 401 (Unauthorized) means: You need to log in: authentication is required and was missing or invalid.
Is HTTP 401 an error?
Yes, a client error: the request was wrong or not allowed. Usually the link, the login or the data sent needs to change.
How do I fix a 401 error?
If you are visiting the site: Log in again or check your username and password; Clear the browser's cache and cookies for this site. If you run the website: Return a WWW-Authenticate header and check how users log in; Check the server error logs at the time of the error.