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quic protocol error 356

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As the name suggests, this error indicates some problem with Chrome’s use of its Quick UDP Internet Connections (QUIC protocol) feature.

The QUIC protocol was developed by Google and helps improve the performance of connection-oriented web applications.

According to W3Techs, only about 3.2% of websites on the Internet are using the QUIC protocol, which means most of the websites you use will not use this protocol.

However, because Google developed the protocol for its own products, most of Google’s sites do use QUIC (including YouTube ). So while the protocol’s overall usage rate is not high, the fact that Google uses QUIC means you’ll interact with sites using QUIC pretty much every day.

Sometimes, the ERR_QUIC_PROTOCOL_ERROR message could be directly caused by the protocol, but it can also be caused by a problem with your Internet connection (or VPN/proxy) or an issue with a browser extension.

Additionally, this error has nothing to do with your WordPress site. However, it can prevent you from accessing your WordPress site sometimes, which is why we’re helping you fix the issue.

How to Resolve ERR QUIC PROTOCOL ERROR in Chrome for Windows 10:

  1. Disable the QUIC protocol
  2. Remove or disable third-party browser extensions
  3. Disable your firewall temporarily
  4. Disable the VPN/proxy when logging into your user account
  5. Reset Chrome to its default settings

Before we begin, try to load the web pages using another browser, such as Edge, Firefox, Opera, or Safari. If they don’t go through and the error message is displayed, then it means that the fault doesn’t lie with Chrome. Check your internet connection and try again.

But if the pages load successfully on another browser, you can go ahead with the solutions below.

Fix 1: Disable the QUIC Protocol

This is the easiest way to resolve the issue. It may suffice, and you won’t have to try any other fix.

Follow these simple steps to get it done:

  1. Launch your Chrome browser.
  2. Go to the URL bar and type (or copy and paste) “chrome://flags” (don’t include the inverted commas) and then press Enter.
  3. On the page that opens, you’ll find a list of experimental features. Under the ‘Available’ section, scroll down and locate “Experimental QUIC protocol” (To make things easier, you can type the name in the Search flags box at the top of the page).
  4. Expand the drop-down menu beside the option and select ‘Disabled.’ Immediately you do so, a dialog will appear at the bottom of the screen, prompting you to relaunch your browser now so as to apply the change. Click the button to restart your browser.
  5. After Chrome restarts, the Experimental QUIC protocol will now be disabled. See if the error has been successfully resolved.

If it happens that the problem somehow persists, go ahead and apply the next fix.

Fix 2: Remove or Disable Third-Party Browser Extensions

Although third-party extensions enhance the functionality of your browser and offer a customized web surfing experience, they can sometimes cause unexpected issues like ‘ERR QUIC PROTOCOL ERROR.’ This is especially so with unknown extensions or those designed to block ads, page pop-ups, and so on.

Therefore, you should disable your extensions and see if there’s one that’s causing the error.

Follow these easy steps:

  1. Launch Google Chrome.
  2. Type (or copy and paste) “chrome://extensions” in the address bar and press Enter.
  3. On the page that opens, click the toggles on the available extensions to disable them.
  4. Restart the browser and see if the error will still occur when you try to load a website. If it doesn’t, then go back to ‘chrome://extensions’ and enable the extensions you trust. This way, you can figure out the one that caused the issue and remove it.

Fix 3: Disable Your Firewall Temporarily

Windows Firewall monitors and controls incoming and outgoing network traffic. It protects your private network against malicious software and keeps unauthorized users from accessing files on your computer.


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If you have another security program that serves the same function (like a trusted anti-malware tool such as Auslogics Anti-Malware), you can try disabling Windows Firewall temporarily. See if that helps in resolving the ‘ERR QUIC PROTOCOL ERROR’ issue.

Follow these easy steps:

  1. Press the Windows logo key + R combination on your keyboard to bring up the Run dialog.
  2. Type ‘Control Panel’ in the text field and press Enter or click OK.
  3. In the window that opens, select ‘Category’ in the ‘View by:’ drop-down in the top-right corner of the screen.
  4. Click on System and Security > Windows Firewall.
  5. On the left-hand side of the screen, click on ‘Turn Windows Firewall on or off.’
  6. Select ‘Turn off Windows Firewall (not recommended)’ and click the OK button to save the change.

Now, try to visit the website once more. If the problem still occurs, go back and enable Windows Firewall again.

You can also disable the firewall on your antivirus program. See if that makes any difference. If it doesn’t, then you should enable it again.

We also suggest you follow the steps below to check if there’s a problem with your firewall or proxy settings. The error in discussion occurs when Google fails to receive data from your end.

Here is how to check your LAN settings:

  1. Go to Control Panel as already shown above.
  2. Select ‘Large icons’ in the ‘View by:’ drop-down.
  3. Click on Internet Options.
  4. In the window that opens, go to the Connections tab and click the LAN Settings button. Review the settings and make sure there is no problem.

Fix 4: Disable the VPN/Proxy When Logging Into Your User Account

Some ISPs (Internet Service Providers) differentiate user accounts. They display a login prompt for you to enter a username and password before you can access the internet.

To fix the QUIC protocol error issue, try disabling your VPN or proxy while logging into your user account.

Here’s how:

  1. Go to the Start menu.
  2. Click on Settings.
  3. Click Network and Internet > Proxy.
  4. Click the toggle to turn on “Automatically detect settings.”
  5. Click the toggle to turn off the “Use a proxy server” option.
  6. Go back to Network and Internet and click on VPN.
  7. Select the connection you want to remove and click the ‘Remove’ button.
  8. Click Remove to confirm.

In the event that you just subscribed to the ISP and don’t have the username and password, confirm from them whether they have such a security protocol in place.

Fix 5: Reset Chrome to Its Default Settings

Resetting Chrome might fix the issue. But keep in mind that your search engine settings, home page, and pinned tabs will be cleared. Also, all browser extensions will be disabled, and temporary files (including cookies and cache) will be erased.

However, saved passwords, bookmarks, and history will not be affected.

Here’s how to reset Google Chrome:

  1. Launch the browser.
  2. Click the Menu icon in the top-right corner of the screen and select Settings.
  3. Scroll down to the bottom of the page and expand the ‘Advanced’ drop-down.
  4. Scroll down again to the bottom of the page. Under ‘Reset and Clean up’, click on ‘Restore settings to their original defaults.’
  5. Now, click the Reset Settings button to confirm the action.
  6. Restart Chrome and see if the error occurs.

The solutions presented here should resolve the ERR QUIC PROTOCOL ERROR issue. But in case you’re still running into it, contact Google Support for further help.

We hope this guide has been of use to you.

Please feel free to share your thoughts in the section below if you have any questions or further suggestions.

We’ll like to hear from you.

Tobenna Nnabeze

04 March 2020 — 6 min read Share to FacebookShare to TwitterShare via EmailShare via Link
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Chrome and QUIC

Google introduced QUIC protocol in Chrome from version 29. This is enabled by default and Chrome serves the supported sites using QUIC protocol. Though QUIC account for only 5% of the Internet traffic as per Wikipedia, nearly all websites owned by Google runs through QUIC protocol. You can easily view the sites using QUIC protocol when you browse through Internet. Enter “chrome://net-internals/#quic” in Chrome address bar. This will show the list of sites served through QUIC. Click on the “View QUIC live sessions” to see the currently opened sites using QUIC. You can simply open “google.com” and see the live session will show it in the list.

View Live QUIC Sessions in Chrome
View Live QUIC Sessions in Chrome
View Live QUIC Sessions in Chrome

Unfortunately, use of QUIC protocol causes ERR_QUIC_PROTOCOL_ERROR to affect many Chrome users. When this error occurs, Chrome will show that the webpage might be temporarily down or moved permanently to a new web address.


Most of the time, the solution for this problem is quite simple and you may get rid of it in just a few minutes. Here are solutions that you can use:

Solution #1 – Disable Experimental QUIC Protocol in Chrome

When ERR_QUIC_PROTOCOL_ERROR message is displayed, you may not be able to access specific websites. A good solution is to disable experimental QUIC protocol. Open Chrome web browser, type the URL command ‘chrome://flags/’ in the address bar and hit enter. A page will be displayed with a warning message, WARNING: EXPERIMENTAL FEATURES AHEAD!

Chrome Flags Warning
Chrome Flags Warning
Chrome Flags Warning

Use the search box and type in ‘Experimental QUIC protocol’ in the search field. You can see the entry for Experimental QUIC protocol and set the option to Disabled

Disable QUIC Protocol in Chrome
Disable QUIC Protocol in Chrome
Disable QUIC Protocol in Chrome

Restart the web browser and verify that the problem has been resolved. In most cases, disabling the protocol could solve the problem.

Solution #2 – Disable Firewall

Windows Firewall offers decent protection against external attacks, but it may also block access to some websites. It’s a good idea to disable Windows Firewall quickly and check whether you can access blocked websites. Follow these steps:

  • Search for ‘windows firewall’ in the search field and click on Windows Firewall in the result.
  • Click on ‘Turn Windows Firewall on or off’.
  • Disable Windows firewall for both public and private networks.

Disable Firewall in Windows 10
Disable Firewall in Windows 10
Disable Firewall in Windows 10

Open Google Chrome and access blocked websites. If you still can’t access these websites, re-enable Windows Firewall.

Similar to Windows, you can disable firewall on Mac with the following steps:

  • Click on the Apple icon on top left corner of on your Mac and go to “System Preferences…”.
  • Go to “Security & Privacy” option and then to “Firewall” tab.
  • Click on the lock button showing “Click the lock to make changes.”
  • Enter your administrator password and click on the “Unlock” button.
  • Now click on the “Turn Off Firewall” button to disable the firewall.

Disabling Firewall in Mac
Disabling Firewall in Mac
Disabling Firewall in Mac

Solution #3 – Disable Chrome Extensions

Extensions are really useful and you can add new features not offered originally by Google. However, some extensions are not well developed and others could introduce new glitches that affect your browsing experience. Identifying troublesome Chrome extensions can be a bit tricky and it takes some time. Follow these steps:

  • Open Chrome web browser and go to the URL “chrome://extensions/”.
  • You will see all installed extensions. Each extension has an option enable or disable.
  • If you think that an extension may cause the problem, switch off the extension.
  • Restart Chrome and verify that the problem has been resolved

Disable Extensions in Chrome
Disable Extensions in Chrome
Disable Extensions in Chrome

Solution #4 – Clear Browsing History

After years of constant web browsing, you might have accumulated lots of cache, history and cookie files. When cache piles up, it will cause issues and slow down the overall performance of Chrome. Follow these steps to delete cache.

  • Open Chrome and press “Control + Shift + Delete” buttons in Windows and “Command + Shift + Delete” buttons in Mac.
  • A new page with ‘chrome://settings/clearBrowserData’ in the address bar will open with a dialog box opened.
  • Check the options ‘Cached images and files’, ’Cookies and other site data’, ‘Browsing history’ and ‘Download history’
  • For the Time Range dropdown menu, choose All Time.
  • Click on the blue Clear Data button.

Delete History Basic View in Chrome
Delete History Basic View in Chrome
Delete History Basic View in Chrome

Restart Chrome and verify that the problem has been resolved.

Solution #5 – Disable VPN

For many Chrome users, connection issues are quite common and everything doesn’t always work in a seamless manner. The Internet connection will get impacted with VPN and proxies that bypass the default service provider’s connection. VPN may cause instability and issues, including ERR_QUIC_PROTOCOL_ERROR. A good way to verify this is by using a different web browser to test whether VPN is causing a problem. Disabling VPN is easy and you can immediately see whether it bring results. If it’s proven that the VPN is the cause ERR_QUIC_PROTOCOL_ERROR, find alternative VPN software. We recommend using premium and reliable VPNs like VyprVPN and ExpressVPN.

ExpressVPN Chrome Extension
ExpressVPN Chrome Extension
ExpressVPN Chrome Extension

Solution #6 – Scan for Viruses

Viruses can cause a lot of problems, including ERR_QUIC_PROTOCOL_ERROR. They need to be eradicated whenever you have the opportunity. Follow these steps on your Windows PC.

  • Search ‘Microsoft Security Essentials’ in the search field and click on Microsoft Security Essentials.
  • In the pop-up window, choose Full to scan your computer thoroughly.
  • Click on ‘Scan Now’ and wait for the scan to complete.
  • Check whether the problem is resolved.

On Mac, there are less possibilities for viruses. Nevertheless you can scan if you have antivirus software installed on your Mac.

Solution #7 – Reset Chrome

If all steps, including disabling the QUIC protocol and clearing cache, don’t bring any result. Then you need to choose a bit more drastic step. Try to reset the browser and your problem can be resolved. Follow these steps:

  • Click on the three vertical dots icon located at the top right corner of your browser.
  • Click on Settings. On the new page, scroll down until you find “Advanced”. Click on it to expand advanced options.
  • Scroll down again and you should find ‘Reset’ at the bottom of the page. A pop up will warn you that all extension and temporary data will be removed.
  • Click on Reset and restart Chrome web browser.

How to Fix ERR QUIC PROTOCOL ERROR in Google Chrome

There are a handful of troubleshooting solutions you can apply. By the time you are done with one or a few of them, the error will have been taken care of.

How to Fix the ERR_QUIC_PROTOCOL_ERROR in Chrome

There are a few different methods to fix the ERR_QUIC_PROTOCOL_ERROR, which we’ll demonstrate below:

  • Disable the QUIC Protocol in Chrome
  • Disable Chrome browser extensions
  • Check proxy settings in Windows

Solution 1: Disable the QUIC Protocol in Chrome

Because the error indicates a problem with the QUIC protocol, one solution is to simply disable the QUIC protocol in Chrome.

To do so, type chrome://flags/ into your Chrome browser address bar. Then, use the search box to search for “quic” to locate the protocol.

From there, use the drop-down to change from Default to Disabled:

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How to disable QUIC protocol in Chrome
How to disable QUIC protocol in Chrome

Once you’ve disabled the Experimental QUIC protocol, restart the Chrome browser to make the changes take effect.

Как устранить ошибку ERR QUIC PROTOCOL ERROR в Chrome для Windows 10:

  1. Отключить протокол QUIC
  2. Удалить или отключить сторонние расширения браузера
  3. Временно отключите брандмауэр
  4. Отключите VPN / прокси при входе в свою учетную запись пользователя
  5. Сбросьте Chrome до настроек по умолчанию

Прежде чем мы начнем, попробуйте загрузить веб-страницы с помощью другого браузера, например Edge, Firefox, Opera или Safari. Если они не проходят и отображается сообщение об ошибке, это означает, что ошибка не в Chrome. Проверьте подключение к Интернету и попробуйте еще раз.

Но если страницы успешно загружаются в другом браузере, вы можете воспользоваться следующими решениями.

Исправление 1: отключите протокол QUIC

Это самый простой способ решить проблему. Этого может хватить, и вам не придется пробовать другое исправление.

Выполните следующие простые шаги, чтобы это сделать:

  1. Запустите браузер Chrome.
  2. Перейдите в адресную строку и введите (или скопируйте и вставьте) «chrome: // flags» (без кавычек), а затем нажмите Enter.
  3. На открывшейся странице вы найдете список экспериментальных функций. В разделе «Доступные» прокрутите вниз и найдите «Экспериментальный протокол QUIC» (чтобы упростить задачу, вы можете ввести имя в поле «Флаги поиска» вверху страницы).
  4. Разверните раскрывающееся меню рядом с параметром и выберите «Отключено». Сразу после этого в нижней части экрана появится диалоговое окно, предлагающее перезапустить браузер, чтобы применить изменения. Нажмите кнопку, чтобы перезапустить браузер.
  5. После перезапуска Chrome экспериментальный протокол QUIC будет отключен. Посмотрите, успешно ли устранена ошибка.

Если случится так, что проблема не исчезнет, ​​примените следующее исправление.

Исправление 2: удаление или отключение сторонних расширений браузера

Хотя сторонние расширения улучшают функциональность вашего браузера и предлагают индивидуальный опыт веб-серфинга, они иногда могут вызывать неожиданные проблемы, такие как «ERR QUIC PROTOCOL ERROR». Это особенно верно в отношении неизвестных расширений или расширений, предназначенных для блокировки рекламы, всплывающих окон и т. Д.

Поэтому вам следует отключить свои расширения и посмотреть, не вызывает ли оно ошибку.

Следуйте этим простым шагам:

  1. Запустите Google Chrome.
  2. Введите (или скопируйте и вставьте) «chrome: // extensions» в адресную строку и нажмите Enter.
  3. На открывшейся странице щелкните переключатели доступных расширений, чтобы отключить их.
  4. Перезапустите браузер и посмотрите, будет ли по-прежнему возникать ошибка при попытке загрузить веб-сайт. Если это не так, вернитесь к chrome: // extensions и включите расширения, которым вы доверяете. Таким образом вы сможете определить причину проблемы и удалить ее.

Исправление 3: временно отключите брандмауэр

Брандмауэр Windows отслеживает и контролирует входящий и исходящий сетевой трафик. Он защищает вашу частную сеть от вредоносного ПО и предотвращает доступ неавторизованных пользователей к файлам на вашем компьютере.

Если у вас есть другая программа безопасности, которая выполняет ту же функцию (например, надежный инструмент защиты от вредоносных программ, такой как Auslogics Anti-Malware), вы можете попробовать временно отключить брандмауэр Windows. Посмотрите, поможет ли это решить проблему «ERR QUIC PROTOCOL ERROR».

Следуйте этим простым шагам:

  1. Нажмите комбинацию клавиш с логотипом Windows + R на клавиатуре, чтобы открыть диалоговое окно «Выполнить».
  2. Введите «Панель управления» в текстовое поле и нажмите Enter или нажмите OK.
  3. В открывшемся окне выберите «Категория» в раскрывающемся списке «Просмотр по:» в правом верхнем углу экрана.
  4. Щелкните Система и безопасность> Брандмауэр Windows.
  5. В левой части экрана нажмите «Включить или отключить брандмауэр Windows».
  6. Выберите «Отключить брандмауэр Windows (не рекомендуется)» и нажмите кнопку «ОК», чтобы сохранить изменения.

Теперь попробуйте зайти на сайт еще раз. Если проблема все еще возникает, вернитесь и снова включите брандмауэр Windows.

Вы также можете отключить брандмауэр в своей антивирусной программе. Посмотрим, имеет ли это значение. Если этого не произошло, вам следует включить его снова.

Мы также предлагаем вам выполнить следующие действия, чтобы проверить, нет ли проблем с настройками вашего брандмауэра или прокси. Ошибка в обсуждении возникает, когда Google не может получить данные с вашей стороны.

Вот как проверить настройки вашей локальной сети:

  1. Перейдите в Панель управления, как уже было показано выше.
  2. В раскрывающемся списке «Просмотр по:» выберите «Крупные значки».
  3. Щелкните Свойства обозревателя.
  4. В открывшемся окне перейдите на вкладку Connections и нажмите кнопку LAN Settings. Проверьте настройки и убедитесь, что проблем нет.

Исправление 4: отключите VPN / прокси при входе в свою учетную запись пользователя

Некоторые Интернет-провайдеры различают учетные записи пользователей. Они отображают приглашение для входа в систему, чтобы вы могли ввести имя пользователя и пароль, прежде чем вы сможете получить доступ в Интернет.

Чтобы исправить ошибку протокола QUIC, попробуйте отключить VPN или прокси при входе в свою учетную запись.

Вот как:

  1. Зайдите в меню Пуск.
  2. Щелкните «Настройки».
  3. Щелкните Сеть и Интернет> Прокси.
  4. Нажмите на переключатель, чтобы включить «Автоматическое определение настроек».
  5. Щелкните переключатель, чтобы отключить параметр «Использовать прокси-сервер».
  6. Вернитесь в Сеть и Интернет и нажмите VPN.
  7. Выберите соединение, которое вы хотите удалить, и нажмите кнопку «Удалить».
  8. Щелкните Удалить для подтверждения.

Если вы только что подписались на интернет-провайдера и у вас нет имени пользователя и пароля, узнайте у них, есть ли у них такой протокол безопасности.

Исправление 5: сбросьте Chrome до настроек по умолчанию

Сброс настроек Chrome может решить проблему. Но имейте в виду, что настройки вашей поисковой системы, домашняя страница и закрепленные вкладки будут удалены. Кроме того, все расширения браузера будут отключены, а временные файлы (включая файлы cookie и кеш) будут удалены.

Однако сохраненные пароли, закладки и история не будут затронуты.

Как исправить ERR QUIC PROTOCOL ERROR в Google Chrome

Вы можете применить несколько решений по устранению неполадок. К тому времени, когда вы закончите с одним или несколькими из них, ошибка будет устранена.


Some of the primary ways to fix the ERR_QUIC_PROTOCOL_ERROR are explored below.

Method 1: Using the chrome://flags Command

1. At First, go to the Chrome browser and go to a new tab.

2. Then enter the command “chrome://flags” in the Address bar. It will take you to a settings menu.

Chrome Flags
Chrome Flags

3. A message/notification will pop-up stating “Careful; these experiments may bite” which will issue a Warning message about employing such “experimental features.” However, the procedure is safe and hence this message can be ignored.

4. Afterward, locate the Experimental QUIC protocol feature either by scrolling down or by pressing the CTRL+F keys. It will make a box called the Find Box appear.

5. Then enter “Experimental QUIC protocol” in this box and type enter.

6. Once located, select Disabled from the drop-down menu and relaunch the Chrome Browser. It should cause the error to disappear.

Check Out: 4 Ways to Fix Second Monitor Not Working in Windows 10

Method 2: Disabling Browser Extensions

As stated earlier, numerous third-party extensions may be the cause of this issue ERR_QUIC_PROTOCOL_ERROR arising and hence disabling them may resolve the issue.

1. At First, go to the Chrome browser and go to a new tab.

2. Then enter the command “chrome://extensions” in the Address bar and click “Enter.”

3. Afterward, go through the Extensions and disable the ones that we do not require.

4. Finally, “Restart” the computer and see if the error persists.

Note: If simply disabling the extensions causes no change, it is advisable to delete the third-party extensions completely.

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  • https://kinsta.com/knowledgebase/err_quic_protocol_error/
  • https://www.auslogics.com/en/articles/fix-err-quic-protocol-error-google-chrome/
  • https://www.WebNots.com/fix-err_quic_protocol_error-in-chrome/
  • https://habrahabr.net/347-how-to-fix-google-chrome-err-quic-protocol-error
  • https://validedge.com/err_quic_protocol_error/
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