Chrome is the most reliable and stable application and the most widely used web browser. Sometimes it can encounter problems that appear occasionally, on the contrary, it often displays the error message which is user intuitive. Among them is the ERR_QUIC_PROTOCOL_ERROR, which appears when using Google’s QUIC transport protocol website it includes many Google-owned pages.

Moreover, Chrome introduced this protocol to add speed to your online experience. At times it fails and displays this cryptic message in place of the webpage you were searching or loading. Since there is no certain fix method to encounter the ERR_QUIC_PROTOCOL_ERROR message. But sometimes the protocols can directly cause the error. Or, there can be a problem with your internet connection.


QUIC is an experimental transport layer network protocol present in Google Chrome for establishing a connection between two endpoints over UDP. It reduces the connection establishment time and improves congestion control.


Moreover; it was developed by Google in order to enhance the performance of a connection-oriented web browser. Google develop it for its own product and QUIC has been used by most of the sites including YouTube. ERR_QUIC_PROTOCOL _ERROR code, there are several other troubleshooting methods to resolve the issue.

Method 1: Use the Chrome Command

There are various methods present to encounter the ERR_QUIC_PROTICOL_ERROR. in order to resolve the issue one of them is by using Chrome://flag command. Therefore for implementing this method the steps are as follow:

Step 1 – Firstly open your Google Chrome web browser.

Step 2 – After that type the command “Chrome://flags/” in the address bar.

Step 3 – Then press Enter key.

Step 4 – Now, look for the Experimental QUIC protocol which is probably set by default.

Step 5 – Then expand the drop-down menu.

Step 6 – After that, select the Disable button.

Step 7 – Then restart the web browser or Google Chrome to see whether the problem is fixed or not.

Therefore this is the chrome://flags/ command method to resolve the ERR_QUIC_PROTOCOL_ERROR error.

Method 2: Disable the Browser Extension

Meanwhile, the error appears after installing the extension on Google Chrome, it’s better to remove the extension or else it will create problem. To remove the browser extension there are the following steps:

Step 1 – First type chrome://extension in the address bar of the web browser.

Step 2 – Then press the Enter key.

Step 3 – After that, a list of installed extensions will appear, find the unknown extension.

Step 4 – Now, click on the Remove button. Or click on the blue toggle to disable it.

Step 5 – Then Restart your web browser and check if the ERR_QUIC_PROTOCOL_ERROR issue is resolved or not.

Method 3: Resetting the Browser

Google Chrome browser continues to evolve and it’s level also enhances when it comes to behavior modification. However various settings are available on the browser from tweaking its homepage personality to utilizing web and prediction services.

There are still some issues, causing the problem or making it worse. It must be chrome’s settings that were hijacked by malware and in order to solve the problems, there is a solution to fix it that is to reset the browser. Therefore for resetting the browser, the steps are as follows:

Step 1 – Firstly open your Google Chrome browser.

Step 2 – After that select the Chrome’s main menu button. Three vertically placed dots present in the upper right-hand corner of the browser window shows this.

Step 3 – Then select the settings option when the drop-down menu appears.

Step 4 – Then scroll to the bottom of the page and press the advanced option. Now the advance settings of Chrome are displayed.

Step 5 – Then scroll and find the Reset settings.

Step 6 – Then select the reset settings and reset your browser.

Method 4: Check the Proxy or Firewall Setting

While using the Windows you may face issues with your proxy server that may be causing the ERR_QUIC_PROTOCOL_ERROR message. In order to check the proxy server there are some following steps:

Step 1 – First, open your Settings area.

Step 2 – Hit the Windows key and then select the Settings gear.

Step 3 – Now search for the internet option. After that select the result.

Step 4 – Then in the Internet properties, go to the Connections tab.

Step 5 – After that select the LAN settings and make sure that the Use a proxy server for your LAN is unchecked.

Step 6 – Then click on the OK button and then Apply button.

Step 7 – Now restart your computer.

Method 5: Temporarily Disable the Firewall

The Windows Firewall prevents your system from various malicious attacks. Moreover, they build a barrier between the internal and external networks. Besides, it will prevent your network to get in access to the suspicious third-party. Therefore you need to temporarily disable the Firewall. For performing this task the following steps are:

Step 1 – First type Window Defender in the search box of the browser.

Step 2 – After that select the Windows Defender Firewall from the contextual menu.

Step 3 – Then navigate to turn Windows Defender Firewall on or off the tab on the left pane.

Step 4 – Now select the checkboxes of the turn off Windows Defender Firewall in private and public network settings in the pop-up window.

Step 5 – After that, click on the OK button.

Step 6 – Then restart your computer.

Step 7 – Lastly, re-access the particular web page and check the error is removed.

If this method fails, feel free to turn on Windows Firewall again.


The ERR_QUIC_PROTOCOL_ERROR message is an error that is specific to the Chrome browser. However, it uses the QUIC protocol network in order to speed up the internet connection. Sometimes the QUIC protocol error occurs because of the extension which needs to be disabled or else it will create a problem and the error message may appear. The proxy server can also cause the error.

So, the proxy server should be checked in order to resolve the problem and another cause of this problem is using Windows Firewall and problem due to the firewall can be resolved by disabling it temporarily. However these were the solutions to solve the QUIC protocol error message.