HTTP 401 Error and How to Fix it?

1
What is an HTTP 401 Error and How to
Fix it?
2
What is a 401 error?

• Here are some of the 401 error variations which
  indicate the same
• HTTP Error 401
• Access denied
• 401 Unauthorized Error
• 401 Authorization Required
• 401 Unauthorized

3
Understanding HTTP Status codes

• If you are a non-techie and dont know exactly
  what are HTTP status codes, they can be
  understood as a set of standardized three-digit
  numbers used by web servers to communicate the
  outcome of a clients request.
• This means they provide you with the status or
  information about the success redirection, type
  of errors, and other states of the
  request-response cycle.
• These status codes play a crucial role in web
  communication as they provide important feedback,
  indicating whether a request was successful or
  encountered any problems. With the assistance of
  these codes, one can readily take appropriate
  actions based on the response received from the
  server.

4
What causes 401 Error?

• Missing or invalid credentials If you are unable
  to provide authentic credentials due to any
  reasons or provide incurred or expired
  credentials, a 401 error will be triggered.
• Unauthorized access attempt When you try to
  access a resource that requires authentication,
  but the provided credentials do not grant
  sufficient permission, a 401 Error will be
  returned.
• Revoked or Expired tokens If you use an expired
  or outdated authentication token, the server may
  respond with a 401 error.
• Corrupt or outdated Browser cache and cookies If
  you ever see a 401 error, its usually because
  your browsers cache and cookies are outdated or
  corrupted. This can cause trouble with
  authorization. If your browser doesnt have the
  correct authentication credentials (or any at
  all), the server wont accept your request. Just
  remember to keep your browsers cache and cookies
  up to date to avoid running into these kinds of
  errors.

5

• Incorrect or Outdated URL Sometimes, in a rush,
  you might mistakenly enter the wrong URL or
  encounter a situation where the URL has been
  changed. This can trigger a 401 error as a
  result.
• Plugin conflicts Sometimes, a 401 error can
  happen because of a plugin issue. For example, if
  you are using a firewall or security plugin that
  might mistakenly think your login attempt is
  suspicious and block access with a 401 error to
  keep the page safe.