How to fix: err_response_headers_multiple_last_modified error in Google Chrome

To fix the err_response_headers_multiple_last_modified error in Google Chrome, you can follow these steps:

1. Clear Browser Cache and Cookies: The simplest and first step is to clear your browser's cache and cookies. This error often occurs due to outdated or corrupted data stored in your browser. To do this, go to Chrome settings, click on "Privacy and security," then "Clear browsing data," select "All time" from the dropdown menu, check "Cookies and other site data" and "Cached images and files," and click on "Clear data."
2. Check for Malware: Sometimes, malware can alter how your browser handles responses from websites, leading to this error. Run a thorough antivirus scan to ensure your system is free of malware.
3. Disable Extensions: Some browser extensions might interfere with how Chrome processes HTTP headers. Try disabling all extensions and then enabling them one by one to identify if a particular extension is causing the problem. To manage extensions, go to Chrome's settings, and click on "Extensions."
4. Update Chrome: Ensure your browser is up to date. Sometimes, these errors are due to bugs that are fixed in newer versions of the browser. Check for updates by going to "About Chrome" in the settings menu.
5. Check Server Configuration: If you are a web developer and see this error on a site you manage, the issue might be on the server side. Ensure that the server isn't sending multiple "Last-Modified" headers. You can check server logs or use tools like browser developer tools to inspect the headers.
6. Contact Website Owner: If the error persists and occurs on a specific website, contact the website owner or administrator. They may be able to correct any server-side issues causing the error.

What causes the err_response_headers_multiple_last_modified error in Google Chrome?

The err_response_headers_multiple_last_modified error in Google Chrome typically occurs when a server sends more than one "Last-Modified" header in its HTTP response. The HTTP specification does not allow multiple instances of the "Last-Modified" header, and when Chrome encounters such a situation, it triggers this error. This can happen due to several reasons:

• Server Misconfiguration: The web server might be configured incorrectly, resulting in sending duplicate headers.
• Proxy Servers: If requests pass through multiple proxy servers, each might add its own "Last-Modified" header, causing the issue.
• Content Delivery Networks (CDNs): Similar to proxy servers, CDNs might mishandle headers, leading to multiple "Last-Modified" headers.
• Caching Issues: Sometimes, caching mechanisms in the browser or intermediate servers can cause the server to think it needs to send an updated "Last-Modified" header when it should not.

Can clearing the browser cache resolve the err_response_headers_multiple_last_modified error?

Yes, clearing the browser cache can often resolve the err_response_headers_multiple_last_modified error. This error may be caused by outdated or corrupted cache data stored in your browser, which could be triggering multiple "Last-Modified" headers being sent. When you clear the browser cache, you are removing these potentially problematic files and allowing the browser to fetch fresh data from the server. To clear the cache, follow these steps:

1. Go to Chrome settings.
2. Click on "Privacy and security."
3. Click on "Clear browsing data."
4. Select "All time" from the dropdown menu.
5. Check "Cookies and other site data" and "Cached images and files."
6. Click on "Clear data."

Clearing the cache alone might not always solve the problem if the issue is related to server-side configurations or extensions, but it's an effective first step in troubleshooting.

Are there any extensions that can help prevent the err_response_headers_multiple_last_modified error in Chrome?

While there are no specific Chrome extensions designed solely to prevent the err_response_headers_multiple_last_modified error, certain types of extensions might help mitigate the issue indirectly:

1. Ad Blockers: Extensions like AdBlock or uBlock Origin can prevent malicious scripts and ads that might alter HTTP headers. While not directly related to this specific error, they could help if the error is caused by malicious content.
2. Security Extensions: Tools like Malwarebytes Browser Guard or AVG Web TuneUp might protect against malware that can interfere with browser functionality, including how headers are processed.
3. Developer Tools Extensions: For web developers, using extensions like "Modify Headers" could help inspect and modify headers directly from the browser, although this should be used cautiously as it can affect how web pages are displayed.
4. Cache Management Extensions: Extensions like "Clear Cache" can automate the process of clearing browser cache, which, as mentioned earlier, can help resolve this error.

It's important to note that while these extensions might help, the primary resolution should focus on server-side fixes if the issue is due to server configuration. Also, be cautious when adding extensions as they can introduce other issues or performance overhead.

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