“The webpage is not available,” “Temporarily down,” or “The site has been permanently moved to a new web address” error irritates users the most on Google Chrome. The desired webpages do not load smoothly and, in turn, consume their valuable time. But why does this happen? If you look closely, you will find the reason written on the screen: ERR_QUIC_PROTOCOL_ERROR.


ERR_QUIC_PROTOCOL_ERROR is one of the errors you face while working on Chrome. It indicates an error related to Quick UDP Internet Connections (QUIC), a protocol by Google Chrome to support low-latency transportation, enhance graphics for games and improve video streaming while keeping the data connections secure and encrypted.

Causes of the ERR_QUIC_PROTOCOL_ERROR in Chrome

As already mentioned, it is due to the Quick UDP Internet Connections (QUIC) protocol by Google. Besides QUIC, the third-party extensions are another reason for ERR_QUIC_PROTOCOL_ERROR in chrome. Third-party extensions are a part of the software that is not created by the makers of the Browser.

Although extensions prove beneficial for the inclusion of new features, they can also have technical glitches that hamper browsing. Disabling or deleting is one way to fix the error in Chrome discussed in detail in this article. (See Method 2)

7 Ways to Fix ERR_QUIC_PROTOCOL_ERROR in Chrome

When you see the error on your webpage, the first thing is to try another web browser like Mozilla Firefox or Internet Explorer. If the page does not load from another browser as well, the problem is on the webpage or with your internet connection. There is no issue with Google Chrome.

If the webpage opens from another browser, you need to fix the ERR_QUIC_PROTOCOL_ERROR in Google Chrome. We have compiled a list of 7 methods that are quite helpful in fixing ERR_QUIC_PROTOCOL_ERROR in Chrome:

Method 1: Using the Chrome://flag Command

The root cause of ERR_QUIC_PROTOCOL_ERROR is the QUIC protocol. Outlined to make the web traffic faster and safer, QUIC has reduced connection time for users. When you change your network connection from Wi-Fi to say, 3G or 4G data pack or vice-versa, QUIC allows a smoother reestablishment of network. However, QUIC is still in its experimental stages and can cause ERR_QUIC_PROTOCOL_ERROR. So, to get rid of the problem, you can disable the QUIC protocol altogether.

The following are the steps to disable QUIC:

Step 1: Open Google Chrome from your desktop and go to a new tab.

Step 2: Type chrome://flag in the Address Bar and press Enter.

Step 3: As soon as you press Enter, you will see a page with WARNING. However, you do not have to worry as it is safe. Hence, ignore the Warning message.

Step 4: Scroll down and find the Experimental QUIC Protocol feature.

Step 5: In case you are unable to find, go to the search box or press Ctrl + F and type Experimental QUIC Protocol and press Enter.

Step 6: After you have identified the feature, click Disabled from the drop-down box. The feature has been disabled. Restart your Google Chrome now and check.

If the problem persists, look for other methods mentioned below.

Method 2: Disable Browser Extensions

As discussed earlier, the other cause of ERR_QUIC_PROTOCOL_ERROR in Chrome is the third-party extensions. The following are the steps to disable the browser extensions:

Step 1: Go to Google Chrome and open a new tab.

Step 2: Go to Address Bar and type Chrome://Extensions and press Enter.

Step 3: Now go to the extension that you think is creating the issue and disable it.

Step 4: Restart your computer. If the problem is still there, it is suggested you delete the extension.

Method 3: Resetting the Browser

When you reset Chrome, it resets all the unwanted changes in your browser. Please note that resetting your browser can clear a lot of your data except saved bookmarks, passwords, and text settings.

Therefore, it is commendable if you save all the prominent links before proceeding with the following steps:

Step 1: Open Google Chrome and click on the three dots on the screen’s top-right corner.

Step 2: Click on Settings.

Step 3: Go to the Advanced settings option.

Step 4: Click on the Reset and Clean up option.

Step 5: Relaunch Google Chrome to see if ERR_QUIC_PROTOCOL_ERROR is solved or not. If the error remains, try other methods.

Method 4: Checking the Proxy or Firewall Settings

Both Proxy and Firewall prevent unauthorized connections to your network. However, proxy and firewall are not the same; they have a huge difference.

A proxy is a program that makes an indirect communication between the user and the server by creating a wall between a local network and the outside network. On the other hand, a firewall program blocks the unauthorized connections between a local network and any other exterior network. This indeed could be one of the reasons you are not able to access certain sites on Google Chrome and facing the ERR_QUIC_PROTOCOL_ERROR.

To fix the error, all you must do is follow these simple steps:

Step 1: Press Windows key and R together. You’ll see a Run box in the bottom left corner of your screen.

Step 2: Type inetcpl.cpl and press Enter. You’ll see a Network Settings box. Alternatively, you can go to Control Panel and click on the Network and Internet option.

Step 3: Click on Connection and then click LAN Settings.

Step 4: In the Automatic Configuration, check the Automatically detect settings option.

Step 5: In the Proxy Server, uncheck the Use a proxy server for your LAN (These settings will not apply to dial-up or VPN connections) option.

Step 5: Press Enter, click on Apply.

Step 6: Restart your computer system.

Method 5: Temporarily Disable the Firewall

If you have tried the above methods but, none of them worked for you, it is always good to check whether you can access the site after temporarily disabling the firewall on your Windows or Mac. If yes, this is the method for you. Follow the below-given steps to disable the Firewall on Windows PC:

Step 1: Check the anti-virus program in your system and disable it for some time.

Step 2: Go back to Google Chrome and try to access the site.

Step 3: If you are still not able to access the site, Go to Control Panel. Click on the first option- System and Security.

Step 4: Select Windows Firewall and select Turn Windows on or off.

Step 5: Choose the option to turn off the firewall and restart. Do not forget to turn on the firewall afterward.

You can also disable the Firewall on your MAC by following the given steps:

Step 1: Go to System Preferences by clicking on the Apple icon on the top left corner.

Step 2: Click on Security and Privacy option.

Step 3: Open the Firewall tab.

Step 4: On the bottom of the screen, click on the Click on the lock to make changes option.

Step 5: Enter your Administrator Password and click Unlock.

Step 6: Click on the Turn off Firewall. Now, your firewall settings are disabled. Try again to reach the site, and do not forget to turn on the Firewall afterward.

Method 6: Scan for Virus

As we all know, viruses are troublesome for our personal computers. They can infect the system in multiple ways and cause substantial damage. The most common source of any virus can be downloadable files containing malware, pirated software, internet, or even CDs.

In response to the increasing virus attacks, a lot of anti-virus software has been launched over the years. If you still have not downloaded the software, you should do it now to prevent your information from reaching the wrong hands and scan your system regularly for viruses and clean it.

Following are the steps you should follow to scan for viruses to fix ERR_QUIC_PROTOCOL_ERROR in Chrome:

Step 1: Go to your Windows Anti-virus program or any other you’ve installed on your computer.

Step 2: Click on Scan and wait until the scan is complete.

Step 3: If there is any virus in your system, follow the steps mentioned there to delete it.

Step 4: Now, try again to access the site.

Method 7: Disable VPN

VPN stands for Virtual Private Network; it ensures the user’s privacy by creating a private internet connection. It helps to keep the data secure by protecting it from the eyes of public Wi-Fi. VPN hides your browsing history, IP address, location, and all your devices from the general connection. However, VPN can cause errors and uncertainty, together with ERR_QUIC_PROTOCOL_ERROR in Chrome. The following are the steps to disable VPN:

Step 1: Go to Control Panel. Click on the Internet and Network.

Step 2: Go to the VPN.

Step 3: Click on the Disconnect or Disable option. Now, you can check whether you can access the site or not.

If VPN is the reason for ERR_QUIC_PROTOCOL_ERROR, then you should search for a substitute for your VPN software.


While you can’t predict why ERR_QUIC_PROTOCOL_ERROR is occurring on Chrome on your system, you can always try to fix it. The above-written methods provide step by step procedure to resolve the issue real quick. We hope this article helps, and you have a significant change in your browsing experience ahead.

In case you are still unable to connect to the site on Google Chrome, try to contact Google Customer Support for further help.