Err_blocked_by_response: Possible Causes and Their Solutions - Position Is Everything (2024)

Err_blocked_by_response is an error message that indicates the remote server or an application is blocking your client from receiving a response after it sent a request for a resource hosted on the server.

This article will dive into the world of web browsers and explain in detail why you’re seeing this error and the steps you can take to view the resource. From our discussion, you’ll know more about web browsers and what can make them show an error message like ERR_BLOCKED_BY_RESPONSE.

To get started, prepare your environment, and we’ll see you at the end of the article after you have a working solution that fits your use case.

Why Is Your Web Browser Showing Err_blocked_by_response?

Your web browser is showing ERR_BLOCKED_BY_RESPONSE because of the following:

• The server has blocked cross-origin requests
• A browser extension is blocking your request
• A network issue is preventing the correct response header
• The server administrator has blocked your IP address
• A mismatch of MIME types

– The Server Has Blocked Cross-origin Requests

A common cause for the ERR_BLOCKED_BY_RESPONSE Google error in your web browser is because Google has blocked cross-origin requests. One method that they can use is to set the “x-frame-options” in their HTTP response header. This prevents their website from being embedded on another website using an HTML iframe.

So, if you’re trying to embed such a website in an iframe, Google will not allow it, and you’ll see the ERR_BLOCKED_BY_RESPONSE Android error if you’re trying it in your Android application.

– A Browser Extension Is Blocking Your Request

Some third-party browser extensions, such as ad blockers, can block certain requests based on their content type. This can result in the ERR_BLOCKED_BY_RESPONSE Facebook error if you have them in your web browser. If you do, know that the following are ways that these extensions can cause this error:

• Altering response headers: Some extensions can alter the response headers, including the “X-Content-Type-Options” header, leading to the error message being displayed.
• Interfering with network traffic: They can also interfere with network traffic by blocking or modifying certain types of network requests, leading to the error message being displayed.
• Causing resource conflicts: Based on their mode of operation, they can cause conflicts with other resources on the page, leading to the error message.

– A Network Issue Is Preventing the Correct Response Header

Network issues can cause the ERR_BLOCKED_BY_RESPONSE Twitter error in your web browser. In this context, a proxy server and a firewall are among what can cause the error. The following list explains how this is possible and other network-related information that can cause the error:

• Firewall restrictions: If a firewall is configured to block certain types of network traffic, it can prevent your browser from receiving the response header containing “X-Content-Type-Options”.
• Proxy server settings: If you’re using a proxy server, it can alter or block the X-Content-Type-Options header, causing the error message to be displayed.
• Network congestion: Network congestion can result in slow response times and cause your browser to timeout before it receives the complete response.

– The Server Administrator Has Blocked Your Ip Address

Normally, you can load resources from a website, but if a server administrator has blocked your IP address, the server will not listen to any request from your client. Instead, it will throw ERR_BLOCKED_BY_RESPONSE for every connection attempt that you make to the server.

When this happens, a possible cause is that you were blocked by the server administrator for suspicious activities. Other possible causes include security concerns, network abuse, or simply to manage their network traffic.

– A Mismatch of Mime Types

The ERR_BLOCKED_BY_RESPONSE will occur if there is a mismatch between the MIME type of your requested resource and the MIME type in the “X-Content-Type-Options” header. For instance, if the server is configured to set the MIME type of a resource as “text/plain” but the actual content of the resource is in “text/javascript” format.

The browser will receive a mismatch between the MIME type specified in the header and the actual content type. As a result, it will block the request and display the “blocked by response” error message.

How To Fix err_blocked_by_response in a Web Browser?

To fix ERR_BLOCKED_BY_RESPONSE in a web browser, allow the loading of the resource from a different origin if you’re the webmaster. You can also troubleshoot your browser extensions or investigate network settings that may be blocking the resource. Also, you can use a VPN or proxy server to bypass restrictions.

Finally, if you’re the server administrator, configure the correct MIME type in the “X-Content-Type-Options”.

– Allow the Loading of Resources From Different Origins

If you’re a webmaster, and if it’s necessary, you can allow the loading of certain resources from different origins. You can use the following steps to install the Apache HTTP server and use it as a CORS proxy:

1. Install Apache HTTP Server based on your operating system.
2. Enable the “mod_proxy” and “mod_proxy_http” modules. To do this, add “LoadModule proxy_module modules/mod_proxy.so” and “LoadModule proxy_http_module modules/mod_proxy_http.so” to the configuration file.
3. Add a reverse proxy configuration to the same configuration file.
4. Add the necessary CORS header to the reverse proxy’s configuration block.
5. Restart the Apache HTTP Server and test the reverse proxy configuration.
6. Deploy the reverse proxy to a production server, if it is not already running on a production server.

For step three above, the following is the reverse configuration, and “/your_relative_path” is the path that will be proxied. And “http://absolute_path_of_your_application/your_relative_path” is the target server’s address and the location of the resources to be proxied.

Finally, the following are the necessary CORS header that you can use for step four:

– Troubleshoot Your Browser Extensions

You can troubleshoot your browser extensions if you’re an end user, and you’re seeing the “blocked by response” error in your web browser. To do this, use any of the following methods:

• Disable extensions in your browser’s add-on manager and determine if any of them are causing the issue.
• Check for updates to any extensions that you have installed, as a newer version may resolve the error.
• Uninstall the extensions and then reinstall them if disabling or updating the extensions does not resolve the issue.

By using any of the methods above, you can track down the extension that’s causing a ERR_BLOCKED_BY_RESPONSE YouTube error. However, if the issue persists, you can investigate your network settings.

– Investigate Resource-blocking Network Settings

You can investigate resource-blocking network settings on your computer using any of the following:

• Check firewall restrictions: Check the firewall configuration to ensure that it is not blocking the required network traffic.
• Review proxy server settings: If you’re using a proxy server, ensure that it is not altering or blocking the “X-Content-Type-Options” header.
• Monitor network congestion: Observe network performance and monitor response times.
• Verify DNS resolution: Check the domain name system (DNS) settings to ensure that your computer can resolve the hostname of the website.

– Use a VPN or Proxy Server To Bypass Restrictions

If you notice that you’re seeing ERR_BLOCKED_BY_RESPONSE because the webmaster blocked your IP address, use a VPN or proxy server. The former or the latter will act as a middleman, and it will forward your traffic to the target website that blocked your IP address.

During this process, the target website will see the IP address of the VPN or proxy server and not your IP address. As a result, it will allow access, and you’ll get a response in your web browser.

– Configure the Correct Mime Type

If you’re a webmaster and notice that an incorrect MIME type is why your users see the “blocked by response” error and you can correct it by using the following steps:

1. Identify the correct MIME type of resource that your user wants from your server.
2. Update the MIME type settings on the server. For Apache, add the following to your “.htaccess” file and replace “.extension” with the extension of the resource: “AddType application/octet-stream .extension”
3. Restart the web server after updating the MIME type settings.
4. Inform your users to clear their browser’s cache and cookies of their web browsers.
5. Verify the changes by asking them to refresh your website in their browser and check the network traffic to ensure that they are getting the correct MIME type.

Conclusion

This article explained why the ERR_BLOCKED_BY_RESPONSE occurs in a web browser and how you can fix it. We covered lots of technical jargon, and the following are important things that we discussed:

• You’re seeing ERR_BLOCKED_BY_RESPONSE because the server or another software is blocking the server’s response.
• The Instagram ERR_BLOCKED_BY_RESPONSE error can happen if you’re trying to embed Instagram in an HTML iframe.
• You can fix the “blocked by response” error by troubleshooting your browser extensions or checking resource-blocking network settings.
• As a server administrator, you can set up a reverse proxy to allow cross-origin requests to some resources, but do this with caution.
• A last resort to fix ERR_BLOCKED_BY_RESPONSE is to reset Chrome and start using it afterward.

At this stage, you know how you can get a response from a server if it’s showing the “blocked by response” error. Share our article, and don’t forget to check our site for other amazing write-ups.