How to Fix ERR_QUIC_PROTOCOL_ERROR in Google Chrome: 3 Methods

by Montel Anthony

Reaching for Google Chrome when experiencing ERR_QUIC_PROTOCOL_ERROR errors can be both confusing and disconcerting for any user, since this error indicates a problem with its Quick UDP Internet Connections (QUIC) protocol for faster web browsing experiences. Understanding and fixing this error are paramount as its occurrence hinders your ability to smoothly access websites while disrupting productivity; effectively dealing with this error restores browser performance while elevating web experience overall.

This article will walk you through three proven solutions to solve ERR_QUIC_PROTOCOL_ERROR errors and ensure a hassle-free browsing experience. First we will explore how to disable QUIC in Chrome (an effective means for dealing with issues associated with its experimental nature); next we’ll delve into disabling potentially disruptive extensions; lastly we will look into changing proxy settings – essential steps if connecting via proxy servers – finally taking up how adjusting these will allow users to resolve ERR_QUIC_PROTOCOL_ERROR errors and return back into a hassle-free browsing experience! By taking these measures you will able to resolve ERR_QUIC_PROTOCOL_ERROR and return into smooth web surfing pleasure once more.



The ERR_QUIC_PROTOCOL_ERROR message appears in Google Chrome when there is a difficulty connecting to a website using the QUIC protocol. This issue may stem from various sources, including misconfigured network settings, firewall or antivirus interference, or problems within Chrome itself or its extensions.

What is the QUIC Protocol?

QUIC (Quick UDP Internet Connections) is a transport layer network protocol developed by Google to enhance web application performance by reducing latency. Built on UDP rather than TCP, QUIC offers enhanced security and speed, making it suitable for applications where low latency is crucial, such as gaming and streaming.

Read our article on How to Fix the ERR_CONNECTION_RESET Error in Chrome (8 Ways)


Several factors can trigger this error:

  • Misconfigured Network Settings: Incorrect setup can prevent QUIC from functioning properly.
  • Security Software Interference: Firewalls and antivirus programs might mistakenly block QUIC traffic.
  • Browser or Extension Issues: Conflicts within Chrome or its extensions can cause this error.
  • Server-Side Problems: If a website has improperly implemented QUIC, it can lead to errors.

Error Summary Table

Error CodeError TypePossible Causes
ERR_QUIC_PROTOCOL_ERRORConnection Failure with QUICNetwork settings, Firewall, Browser issues

This table outlines the primary reasons behind the ERR_QUIC_PROTOCOL_ERROR, helping you identify and resolve the issue more efficiently.

Method 1: Disabling the QUIC Protocol

Access Chrome Flags

To begin disabling the QUIC protocol in Google Chrome, open your browser and type chrome://flags in the address bar. Press Enter to access the flags page where you can modify experimental features.

Locate QUIC Protocol Setting

Once on the flags page, use the Search flags bar to look for “QUIC.” This will filter out the relevant setting for you. You should see an option labeled Experimental QUIC protocol.

QUIC protocol experimental / ERR_QUIC_PROTOCOL_ERROR

Disable QUIC Protocol

To disable the QUIC protocol, click on the drop-down menu next to Experimental QUIC protocol and select Disabled. After making this change, restart Google Chrome to ensure that the new setting takes effect. Disabling QUIC can help resolve certain connectivity issues and improve compatibility with network monitoring tools that do not support this experimental protocol.

Method 2: Disabling Chrome Extensions

Access Extensions Menu

To start troubleshooting the ERR_QUIC_PROTOCOL_ERROR by managing your Chrome extensions, open a new tab in Google Chrome and click on the three vertical dots located in the top right corner of your browser. Navigate to More Tools and then select Extensions. This will bring you to a page where all installed extensions are listed.

Disable All Extensions

Once you are on the extensions page, systematically disable each extension by clicking the toggle button next to each one. This action turns off the extension without removing it, allowing for easy reactivation. If you suspect a recently added extension, consider disabling it first to see if it resolves the error.

Re-enable to Identify Problematic Extension

After disabling all extensions, restart Chrome to check if the ERR_QUIC_PROTOCOL_ERROR persists. If the error is resolved, begin re-enabling each extension one by one. Revisit the website that was causing the error after enabling each extension to identify which one triggers the ERR_QUIC_PROTOCOL_ERROR. This step-by-step approach helps pinpoint the problematic extension without the need to diagnose each one individually.

Method 3: Checking Proxy Settings

To address the ERR_QUIC_PROTOCOL_ERROR by adjusting your proxy settings in Windows, follow these detailed steps:

Locate Internet Options in Windows

  1. Press the Windows key and type “Internet Options”, then press Enter. This action opens the Internet Properties dialog.
  2. Navigate to the “Connections” tab and click on “LAN settings”.

Adjust LAN Settings

In the LAN settings window, you will see various options for configuring your network connections.

Uncheck Proxy Server Option

Ensure that the “Use a proxy server for your LAN” option is unchecked. This is crucial because if it’s checked, it could be routing your internet traffic through a server that does not support the QUIC protocol, leading to potential errors. After unchecking, click “OK” to apply the changes and then “Apply” in the Internet Properties window.

By following these steps, you remove the possibility of proxy settings interference, allowing Google Chrome to establish a direct connection to the internet, which is less likely to encounter protocol compatibility issues.


Through the comprehensive exploration of methods to tackle the ERR_QUIC_PROTOCOL_ERROR in Google Chrome, this article has provided a roadmap for restoring optimal browsing functionality. By addressing the error from multiple angles—disabling the QUIC protocol directly in Chrome, managing extensions to weed out conflicts, and adjusting proxy settings to ensure seamless connectivity—we’ve delivered solutions that cater to diverse technological environments and user needs. These strategies underscore our commitment to enhancing web browsing experiences while acknowledging the complex interplay of software and network configurations.

Reflecting on the broader impact of these solutions, it’s clear that understanding and resolving the ERR_QUIC_PROTOCOL_ERROR not only improves individual browsing efficiency but also contributes to a larger dialogue on internet accessibility and the performance of web technologies. The significance of these interventions extends beyond immediate technical fixes, shaping future discussions around the evolution of internet protocols and the optimization of the web for users worldwide. By adhering to the outlined approaches, users are empowered to navigate the digital realm with confidence and expertise, assured by a foundation of knowledge that anticipates and addresses potential disruptions in the ever-changing landscape of internet technologies.


What are the steps to resolve the ERR_QUIC_PROTOCOL_ERROR in Google Chrome?

To fix the ERR_QUIC_PROTOCOL_ERROR in Chrome, follow these instructions:
Open a new tab in Chrome.
Type chrome://flags/ into the address bar.
Search for “Experimental QUIC protocol.”
Using the drop-down menu, select “Disable.”
Restart Chrome to apply the changes.

How can I activate the QUIC protocol in Google Chrome?

To enable the QUIC protocol in Google Chrome, whether on a desktop or an Android device, follow these steps:
Navigate to chrome://flags in your Chrome browser.
Search for the “Experimental QUIC” flag.
Set it to “Enabled.”

How do I address the Err_Address_Unreachable error in Chrome?

To resolve the Err_Address_Unreachable error, you should clear your browser’s cache and browsing data. This process removes stored cache and cookies that might be causing the issue. Here’s how:
Open Chrome settings.
Go to the Privacy and Security section.
Select “Clear browsing data” and make sure to include cookies and cached files.

What is the procedure to turn off QUIC on a Chromebook?

To disable QUIC on your Chromebook, follow these steps:
In your Chrome browser, type chrome://flags#enable-quic into the address bar.
Find the “Experimental QUIC protocol” flag and set it to “Disabled.”
Relaunch Chrome to ensure the changes take effect.

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