How To Fix ERR_BLOCKED_BY_RESPONSE Error? Causes and Solution


Have you ever come across the irritating “ERR_BLOCKED_BY_RESPONSE” or “NET::ERR_BLOCKED_BY_CLIENT” while browsing online? This error message signals a hiccup in communication between your device and the website server.

With more than 20 years of experience in the IT industry, we’ve assisted thousands of clients in overcoming this issue and very recently fixed the same issue for a client, so the below steps are trialled, tested and confirmed to be working.

Understanding the “ERR_BLOCKED_BY_RESPONSE” Error

The “ERR_BLOCKED_BY_RESPONSE” error message occurs when the client is blocked from receiving a response after sending a request for a resource hosted on the server.

Common Causes of the “ERR_BLOCKED_BY_RESPONSE” Error

The “ERR_BLOCKED_BY_RESPONSE” error can occur due to various reasons such as security settings, browser cache, JavaScript and browser extensions, server blocking cross-origin requests, and more.

Read on to understand the common causes of this error and how to fix it.

Security Settings and Web Filters

Stringent security settings and web filters significantly contribute to the occurrence of the error. They act as guards, filtering the data that passes between servers and web browsers.

These protocols can sometimes mistakenly block useful information, leading to errors. For example, firewall restrictions or proxy settings create a barrier against receiving necessary response headers, causing these errors as an unintended consequence.

Therefore, adjusting your browser’s security settings or turning off web filters can provide an immediate solution for resolving this error.

Browser Cache and Cookies

The browser cache is a storage space within your web browser that keeps copies of visited websites, enabling quicker load times on subsequent visits. Cookies, on the other hand, are small files placed by websites to track user behavior and personalize the browsing experience.

Both cache and cookies play significant roles in causing the error. Unbeknownst to many users, accumulated cache and outdated cookies can disrupt how a website interacts with your browser – eventually leading to this unwelcome error message.

Fixing it may be as simple as clearing out old cached data or wiping away stored cookies from particular sites.

JavaScript and Browser Extensions

JavaScript and browser extensions can often be the culprits behind the “ERR_BLOCKED_BY_RESPONSE” & “NET::ERR_BLOCKED_BY_CLIENT” errors. This error occurs when your browser is not able to receive a response after sending a request for a resource hosted on a server.

Certain browser extensions, like ad blockers, have the ability to block requests based on content type, leading to this error message. Additionally, JavaScript can also interfere with the proper functioning of web pages and trigger this error.

To troubleshoot this issue, you can try disabling any browser extensions that might be causing the problem or updating them to their latest versions. Furthermore, checking for updates in your JavaScript code and ensuring it is properly implemented can help resolve this error as well.

Server Blocking Cross-origin Requests

One of the common causes of the “ERR_BLOCKED_BY_RESPONSE” error is when a server blocks cross-origin requests. Cross-origin requests occur when a website tries to access resources hosted on another domain, such as loading an image or a script from a different server.

This error can happen if the server has set certain security measures, like the “x-frame-options” header, which prevents its content from being embedded on other websites using iframes.

To fix this issue, webmasters need to allow the loading of resources from different origins by configuring their server’s Cross-Origin Resource Sharing (CORS) settings. By adding appropriate CORS headers to their response, webmasters can instruct browsers to allow cross-domain requests and prevent the error from occurring.

Browser Extension Blocking Requests

One common cause of the “ERR_BLOCKED_BY_RESPONSE” error is browser extensions that block requests. Certain browser extensions, such as ad blockers, have the ability to block requests based on their content type, which can trigger this error.

These extensions work by examining the request and response headers and determining whether or not to allow them to pass through. If a requested resource doesn’t meet the criteria set by the extension, it will be blocked, resulting in the error message.

To resolve this issue, you can try disabling or adjusting your browser extensions in order to allow the necessary requests to go through properly.

Network Issues Preventing Correct Response Header

Network issues can often be the culprit behind the “ERR_BLOCKED_BY_RESPONSE” error. These issues can arise from firewall restrictions or proxy server settings that prevent your browser from receiving the necessary response header.

When this happens, your browser is unable to properly communicate with the server and retrieve the requested resource, resulting in the error message. To troubleshoot this issue, you can check your network connectivity, ensure that firewall settings are not blocking essential headers, or adjust proxy server configurations if applicable.

By addressing these network-related problems, you’ll be able to resolve the error and access the desired resources without any hindrance.

Server Administrator Blocking IP Address

One possible paragraph for the section on “Server Administrator Blocking IP Address” could be:

The error can sometimes occur when a server administrator blocks the IP address associated with a particular request. This can happen due to various reasons, such as security concerns or attempts to mitigate potential threats.

When this happens, the server refuses to respond to any requests coming from that specific IP address, resulting in the error message. If you encounter this error, it may be necessary to reach out to the server administrator and request them to whitelist your IP address in order to regain access.”.

Mismatch of MIME Types

One common cause of the “ERR_BLOCKED_BY_RESPONSE” error is a mismatch of MIME types. The MIME type specifies the format or type of a file being requested from the server. When there is a discrepancy between the MIME type specified in the response header and the actual content type of the resource, this error can occur.

For example, if a web page requests an image file with a specific MIME type, but the server sends back a different MIME type or no MIME type at all, it can lead to this error message.

This mismatch can prevent the browser from correctly interpreting and displaying the requested resource.

To fix this issue, webmasters need to ensure that they are specifying and serving resources with accurate and matching MIME types. They may need to check their server configurations and make any necessary adjustments to ensure proper handling of file types.

How to Fix the “ERR_BLOCKED_BY_RESPONSE” Error

To fix the error, you can clear your browser cache and cookies, disable any problematic browser extensions, and adjust your security settings. Read on to learn more about troubleshooting steps for resolving this error.

1. Clearing Browser Cache and Cookies

Clearing browser cache and cookies is a common troubleshooting step that can help resolve the “ERR_BLOCKED_BY_RESPONSE” error. This error can occur when the browser is unable to receive a response from the server after sending a request. Clearing your browser’s cache and cookies can help resolve any conflicts or issues that may be causing the error. Here are the steps to clear your browser cache and cookies:

  1. Open your preferred web browser.
  2. Click on the menu button, usually represented by three dots or lines, located in the top right corner of the browser window.
  3. From the drop – down menu, select “Settings” or “Options.”
  4. In the settings or options menu, locate and click on “Privacy”, “Browsing Data”, or similar.
  5. Look for an option to clear browsing data, which may include options like “Clear browsing history”, “Clear cache”, or “Clear cookies”.
  6. Select these options to clear your browsing history, cache, and cookies.
  7. You may also have the option to choose a specific time range for clearing data; select “All time” or a relevant time range.
  8. After selecting the desired options, click on the “Clear” or “Delete” button to initiate the clearing process.
  9. Once completed, restart your browser.

This can fix most of Google Chrome errors. Read our guide on how to fix another common error: NET::ERR_CERT_AUTHORITY_INVALID

2. Disabling Browser Extensions

To fix the “ERR_BLOCKED_BY_RESPONSE” error, one of the troubleshooting steps you can take is to disable browser extensions. Certain extensions, such as ad blockers or content filters, may block requests based on their content type, leading to this error. Here’s what you can do:

  1. Open your web browser and navigate to its settings or options menu.
  2. Look for the “Extensions” or “Add – ons” section.
  3. In this section, you’ll see a list of all the installed extensions.
  4. To disable an extension, simply toggle the switch or click on the disable button next to it.
  5. You can also try disabling multiple extensions at once to identify which one might be causing the issue.
  6. Once disabled, refresh the page where you encountered the error and check if it resolves the problem.

3. Adjusting Security Settings

Adjusting security settings can help resolve the “ERR_BLOCKED_BY_RESPONSE” error. Here are some steps you can take:

  1. Update your browser and operating system: Keeping your software up to date ensures that you have the latest security patches and bug fixes.
  2. Check for malware or viruses: Run a thorough scan of your computer using reliable antivirus software to detect and remove any malicious programs that may be interfering with your internet connection.
  3. Contact the website administrator: If you encounter this error on a specific website, reach out to their support team or webmaster to report the issue. They may be able to provide guidance on resolving the error.
  4. Allow loading of resources from different origins: Some websites block requests from different origins as a security measure. You can bypass this by configuring your browser settings or using browser extensions that allow cross-origin requests.
  5. Troubleshoot browser extensions: Disable any browser extensions one by one to identify if any of them are causing the error. Re-enable them after testing each one to determine if they are compatible with the website you’re trying to access.
  6. Investigate resource-blocking network settings: Check if there are firewall restrictions or proxy server settings in place that could be blocking the proper response header from reaching your browser. Consult your network administrator or IT department for assistance in troubleshooting these settings.
  7. Use a VPN or proxy server: If certain websites are consistently giving you the error, consider using a virtual private network (VPN) or proxy server to bypass any regional restrictions or network blocks that may be causing the issue.
  8. Configure the correct MIME type: Ensure that the MIME type specified in the response header matches the actual content type of the requested resource. This can be resolved by updating server configurations or consulting with the website administrator.

4. Updating Browser and Operating System

Updating your browser and operating system is an essential step in troubleshooting the “ERR_BLOCKED_BY_RESPONSE” error. By keeping your software up to date, you can ensure that you have the latest security patches and bug fixes, which can help resolve compatibility issues that may be causing the error.

  1. Check for updates regularly: Most modern browsers, such as Chrome, Firefox, and Safari, have an automatic update feature that ensures you are using the latest version. However, it’s always a good idea to manually check for updates on a regular basis to ensure that you’re not missing any crucial updates.
  2. Update your operating system: In addition to updating your browser, it’s also important to keep your operating system updated. Whether you’re using Windows, macOS, or Linux, regularly installing the latest updates will help improve the security and performance of your computer.
  3. Enable automatic updates: To make sure you never miss an update, consider enabling automatic updates for both your browser and operating system. This way, new updates will be installed automatically without requiring manual intervention from you.
  4. Restart your computer after updating: After installing any updates for your browser or operating system, it’s a good practice to restart your computer. This helps ensure that all changes are properly applied and any necessary system files are refreshed.

5. Checking for Malware or Viruses

Malware or viruses on your computer can sometimes cause the “ERR_BLOCKED_BY_RESPONSE” error. Here are some steps you can take to check for malware or viruses:

  1. Run a full system scan using a reliable antivirus software.
  2. Update your antivirus software to ensure it has the latest virus definitions.
  3. Use a reputable anti – malware program to scan your computer for any malicious software.
  4. Keep your operating system and browsers up to date with the latest security patches.
  5. Be cautious when downloading files or clicking on links from unfamiliar sources.
  6. Avoid visiting suspicious websites that may contain malware or viruses.
  7. Regularly check for any unauthorized changes in your browser settings or extensions.

6. Contacting Website Administrator

If you are facing the “ERR_BLOCKED_BY_RESPONSE” error and none of the troubleshooting steps have resolved the issue, it may be time to consider contacting the website administrator.

The website administrator is responsible for managing and maintaining the website’s server and can help resolve any server-related issues that might be causing this error.

By reaching out to the website administrator, you can explain the specific error message you are receiving and provide details about your operating system, browser, and any relevant network settings.

This information will assist them in identifying potential causes or conflicts that could be contributing to the error.

The website administrator will have access to logs and server configurations that can shed light on why your requests are being blocked. They can check if there are any IP address blocks in place or if there have been recent changes made to security settings that could affect your ability to access certain resources.

7. Allowing Loading of Resources from Different Origins

To resolve the “ERR_BLOCKED_BY_RESPONSE” error, one troubleshooting step involves allowing the loading of resources from different origins. This error can occur when a website blocks requests to load resources from other domains.

To fix this, you can configure Cross-Origin Resource Sharing (CORS) headers on the server side to permit these cross-origin requests. By enabling this feature, you ensure that necessary resources are allowed to load and prevent the error from occurring.

Troubleshooting CORS-related issues is crucial for resolving the  error effectively.

8. Troubleshooting Browser Extensions

Browser extensions can often cause the “ERR_BLOCKED_BY_RESPONSE” error. If you’re experiencing this issue, here are some steps to troubleshoot browser extensions:

  1. Disable or Remove Extensions: Start by disabling all your browser extensions and then try accessing the website again. If the error disappears, you can enable the extensions one by one to identify which one is causing the problem. Once identified, either remove or update the problematic extension.
  2. Update Extensions: Outdated extensions may not be compatible with the latest browser updates, leading to errors. Check for updates in your browser’s extension manager and update any outdated extensions.
  3. Reinstall Extensions: If updating doesn’t solve the issue, consider reinstalling the problematic extension completely. Uninstall it from your browser and then download and install the latest version from a trusted source.
  4. Use Incognito Mode: Open your browser in incognito mode or private browsing mode and try accessing the website again. This mode disables most extensions by default, allowing you to determine if an extension is causing the error.
  5. Check Compatibility: Some extensions may conflict with certain websites or functionalities, resulting in this error message. Check if there are any known compatibility issues between specific extensions and websites you’re trying to access.

9. Investigating Resource-blocking Network Settings

When encountering the “ERR_BLOCKED_BY_RESPONSE” error, it is important to investigate resource-blocking network settings. This will help identify and address any network configuration issues that may be causing the error. Here are some steps to follow:

  1. Check firewall restrictions: Ensure that there are no firewall rules in place that could be blocking the necessary response headers from reaching the browser.
  2. Review proxy server settings: If you are using a proxy server, check its settings to see if it is causing any interference with the response headers. Adjust or disable the proxy server if necessary.
  3. Monitor network congestion: High network congestion can sometimes result in incomplete or blocked responses. Use network monitoring tools to identify any congested areas and address them accordingly.
  4. Verify DNS resolution: DNS resolution issues can prevent the browser from receiving the correct response header. Make sure that DNS is working properly and there are no misconfigured settings.

10. Using a VPN or Proxy Server to Bypass Restrictions

One way to overcome restrictions and resolve the “ERR_BLOCKED_BY_RESPONSE” error is by using a VPN or proxy server. This allows you to bypass any network or server limitations that may be causing the error. Here’s how you can do it:

  1. Install a reliable VPN (Virtual Private Network) or proxy server software on your device.
  2. Open the VPN or proxy server application and connect to a server location that is not affected by the restrictions causing the error.
  3. Once connected, open your browser and try accessing the website again. The VPN or proxy server will mask your IP address and make it appear as if you are browsing from a different location, bypassing any blocks in place.
  4. If the  error no longer appears, then the issue was likely due to restrictions imposed by your network or geographical location.

11. Configuring the Correct MIME Type

To fix the “ERR_BLOCKED_BY_RESPONSE” error, one of the troubleshooting steps is to configure the correct MIME type. The MIME type specifies the nature and format of a file being transmitted over the internet.

This error can occur if there is a mismatch between the MIME type specified in the response header and the actual content type of the resource. To resolve this issue, webmasters or website administrators need to ensure that they have correctly set up and configured the appropriate MIME types for their resources.

By doing so, they can ensure that browsers interpret and handle these files correctly, preventing any blockage issues related to incorrect MIME types.

12. Reset Chrome flags

One potential solution to fix the ERR_BLOCKED_BY_RESPONSE error is to reset Chrome flags. Chrome flags are experimental settings that allow users to customize their browsing experience.

However, sometimes these flags can cause conflicts and result in various error messages:

To reset Chrome flags, follow these steps:

1. Open a new tab in Google Chrome.

2. Type “chrome://flags” (without quotation marks) in the address bar and press Enter.

3. You will now see a long list of experimental features and settings.

4. Click on the “Reset all to default” button located at the top right corner of the page.

5. Restart your browser for the changes to take effect.

By resetting Chrome flags, you can eliminate any potential conflicts or misconfigurations that may be causing the error. It’s important to note that this should be considered as a last resort if other troubleshooting methods fail.

Implementing this solution may help resolve the issue for many users experiencing this specific error message while accessing various websites or web resources on Google Chrome browsers.

13. Contact Hosting

Don’t let this error hold you back – take action now and contact your hosting provider for assistance in resolving the error.

14. Whitelist the Website

To resolve the “ERR_BLOCKED_BY_RESPONSE” error, one of the solutions is to whitelist the website. Whitelisting a website means allowing it to bypass any security measures or filters that might be causing the error.

By adding the website to your browser’s whitelist or trusted sites list, you ensure that it is recognized as a safe and legitimate source.

Whitelisting is especially useful when security settings or web filters are blocking certain requests from loading properly. It can also help if specific network settings or server configurations are preventing the correct response header from being received by your browser.

To whitelist a website, you can usually do so through your browser’s settings or preferences menu. Look for options related to security, privacy, or content permissions. Add the URL of the problematic website to the allowed list or trusted sites list, depending on how your browser labels it.

By whitelisting the website in question, you’re essentially telling your browser and any associated security tools that this particular site should be considered safe and allowed access without interference.


In conclusion, the “ERR_BLOCKED_BY_RESPONSE” error can be frustrating when trying to access certain resources on the web. However, by understanding the causes and following the troubleshooting steps outlined in this guide, users can overcome this issue and regain access to blocked content.

Clearing cache, adjusting security settings, and investigating network settings are just a few of the effective solutions that can help resolve this error. By implementing these tips, users can navigate their online experience smoothly without encountering the error.

I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...