How to fix: err_response_headers_multiple_www_authenticate error in Google Chrome

The err_response_headers_multiple_www_authenticate error in Google Chrome typically occurs when the server responds with multiple WWW-Authenticate headers, which violates the HTTP protocol standards. Here are steps you can take to resolve this issue:

1. Check Server Configuration: The most common cause of this error is a misconfiguration on the server side. If you have control over the server, review your authentication settings. Ensure that only one WWW-Authenticate header is being sent in response. You can use tools like curl to inspect the headers sent by the server:

   <code>curl -I <url></url></code>

   Look for multiple WWW-Authenticate headers in the output.

2. Contact the Website Administrator: If the website does not belong to you, contact the website administrator and report the issue. They need to fix their server configuration to comply with HTTP standards.
3. Update Chrome: Ensure that you are using the latest version of Google Chrome. Sometimes, browser updates can fix issues related to how headers are processed. You can check for updates by going to chrome://settings/help.
4. Try Another Browser: If the issue persists, try accessing the website using a different browser to see if the problem is specific to Chrome. If it works in another browser, it further indicates that the issue is with Chrome or its extensions.
5. Disable Extensions: Some Chrome extensions might interfere with how headers are handled. Try disabling all extensions and then re-enable them one by one to identify any problematic extension. You can access extensions by going to chrome://extensions/.
6. Clear Cache and Cookies: As a general troubleshooting step, clearing your browser's cache and cookies can sometimes resolve issues related to headers. This step will be discussed in detail in a later section.

What causes the err_response_headers_multiple_www_authenticate error in Google Chrome?

The err_response_headers_multiple_www_authenticate error in Google Chrome is caused by a server responding with multiple WWW-Authenticate headers. This violates the HTTP/1.1 specification, which dictates that a server should send only one WWW-Authenticate header in a response when it requires authentication. The reasons for this error can include:

• Server Misconfiguration: The most common cause is a misconfiguration on the server side. For instance, if a server is configured to use multiple authentication schemes simultaneously (e.g., both Basic and Digest authentication), it might incorrectly send multiple WWW-Authenticate headers.
• Load Balancer or Proxy Issues: Sometimes, load balancers or proxies in the request path might add additional WWW-Authenticate headers, causing the server's response to include more than one.
• Custom Middleware: If the website uses custom middleware or application code that adds authentication headers, it might inadvertently add multiple WWW-Authenticate headers.
• Browser-Specific Handling: Although rare, the way browsers interpret and handle multiple headers can also lead to this error. However, this is typically a server-side issue rather than a browser issue.

Can clearing browser cache and cookies resolve the err_response_headers_multiple_www_authenticate error?

Clearing browser cache and cookies can sometimes resolve the err_response_headers_multiple_www_authenticate error, but it is not a guaranteed fix. The primary cause of this error is server-side misconfiguration, so clearing cache and cookies would only help if the error was exacerbated by corrupted local data. Here’s how you can clear cache and cookies in Chrome:

1. Open Chrome Settings: Click on the three vertical dots in the top right corner and select Settings.
2. Go to Privacy and Security: In the left sidebar, click on Privacy and security.
3. Clear Browsing Data: Click on Clear browsing data. You can also access this directly by typing chrome://settings/clearBrowserData in the address bar.
4. Select Data to Clear: Ensure that Cookies and other site data and Cached images and files are checked. You can choose the time range from which to clear data.
5. Clear Data: Click on Clear data to proceed.

After clearing the cache and cookies, try accessing the website again. If the error persists, it indicates that the issue is more likely due to server misconfiguration rather than corrupted local data.

Are there specific extensions that might trigger the err_response_headers_multiple_www_authenticate error in Chrome?

While the err_response_headers_multiple_www_authenticate error is predominantly caused by server-side issues, certain Chrome extensions might interfere with how headers are processed or added to requests and responses. However, there are no specific extensions universally known to cause this error. Instead, it's more about how certain extensions interact with the server's response. Here are some general types of extensions that could potentially contribute to this error:

• Security and Privacy Extensions: Extensions that modify headers for privacy or security reasons might inadvertently add or modify WWW-Authenticate headers. Examples include extensions like uBlock Origin, Privacy Badger, or HTTPS Everywhere.
• Authentication-Related Extensions: Extensions that manage or automate authentication processes might interfere with the server's authentication headers. For example, extensions that handle single sign-on or password managers.
• Proxy or VPN Extensions: These can add headers to the request or modify the response, potentially causing multiple WWW-Authenticate headers to be sent back.

To determine if an extension is causing the issue, you can try the following:

1. Disable All Extensions: Go to chrome://extensions/ and toggle off all extensions.
2. Test the Website: Try accessing the website again to see if the error persists.
3. Re-enable Extensions One by One: If the error goes away with all extensions disabled, re-enable them one at a time and retest the website after each re-enabling to identify the problematic extension.

If you identify a specific extension causing the issue, consider reporting it to the extension developer or finding an alternative extension that does not trigger the error.

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