How to Fix the ERR_QUIC_PROTOCOL_ERROR?

What is ERR_QUIC_PROTOCOL_ERROR?

The ERR_QUIC_PROTOCOL_ERROR is an error code that appears when some issue is related to the QUIC (Quick UDP Internet Connections) protocol. QUIC is a transport layer network protocol created by Google which is aimed at making internet connections faster.

This is done due to the decrease in latency in contrast to normal TCP connections, the use of multiplexed connections, and enhanced security features close to those in TLS.

This error means that the QUIC protocol is problematic during the communication between a client e.g. a web browser and the server.

Causes of ERR QUIC PROTOCOL ERROR

The ERR_QUIC_PROTOCOL_ERROR is a chrome instinct error that is associated with the Google developed QUIC protocol which seeks to make web connections faster and stronger.

This error is associated with Google Chrome and is caused by the failure of the QUIC protocol during the connection process. Here are the primary causes of this error:

Network Issues

Some of the causes of the error include network issues including but not limited to poor or intermittent connections. QUIC works on top of UDP and, as is known, the UDP packets are more vulnerable to the network dropping, latency and consequent connection disruption than TCP packets.

Also Read: What is User Datagram Protocol (UDP)? TCP vs UDP: What’s the Difference

This is quite typical if the access point is in a mobile or Wi-Fi type of connection in which signal strength and quality can be vulnerable.

Firewall or Antivirus Interference

Antivirus software and firewalls can disrupt, or prevent the usage of the QUIC protocol. It also means that these security tools may not fully understand or necessarily support QUIC.

Hence they end up blocking QUIC connection or mauling packets in a manner that hampers how QUIC works. Simply changing the settings of these programs or even suspending them will assist in pinpointing if they are the ones that lead to the said issue.

Server-Side Configuration Issues

The server that you are establishing a connection with might be having problems with the use of QUIC. Some of which are misconfiguration, software bugs or even compatibility issues that the QUIC protocol has with other systems.

In case of QUIC connection, if the server is misconfigured or doesn’t meet the requirements for such a protocol, the clients experience the ERR_QUIC_PROTOCOL_ERROR.

Browser or Client-Side Configuration

This one can be on the client side, and often due to the browser. Another possible reason about Google Chrome can be due to certain misconfigured settings or even cached data that can impede QUIC connections.

It becomes possible to clear such problems by clearing browser cache or updating the Chrome browser to the newest version or disabling and enabling the QUIC protocol in the Chrome settings.

ISP-Level Restrictions

Due to these protocol characteristics, Internet Service Providers (ISPs) might block or throttle the QUIC traffic. This may occur if the specific ISP policy or setting is not friendly to or does not support QUIC connections.

For this, asking the ISP to help or switching to a different network shows if the ISP is the cause of the problem.

Incompatibility with Certain Websites

There are cases where some websites or web services have not adapted or implemented QUIC protocol or have certain limitations resulting in the occurrence of the this error.

This could be because these websites only support HTTP/HTTPS over TCP and not over QUIC and such attempts yield the error.

Browser Extensions and Plugins

Some extensions and plugins to the browser can have a negative impact on the QUIC protocol. Other extensions having an intention of security, privacy or to alter the network behavior can also affect or block the QUIC connection resulting in this error.

This can be resolved by disabling extension and when the connection is tested, one would realize that a specific extension is affecting the function.

How to Fix the ERR_QUIC_PROTOCOL_ERROR in Chrome?

It is one of the Google Chrome related errors and it is related to QUIC (Quick UDP Internet Connections).

In accordance with its objective statement, this protocol is intended to enhance the accessibility of web pages as well as connection security. Still, it can lead to problems resulting in the ERR_QUIC_PROTOCOL_ERROR at times.

Here, we have elaborated three effective ways for the correction of this error:

Disable the QUIC Protocol in Chrome

The best solution to the issue is to turn off the QUIC protocol in Chrome since it is usually the most functional way to address the problem. Here’s how to do it:

• Open Chrome: Open google chrome web browser on your computer.
• Access Chrome Flags: To open the chrome flags simply just type chrome://flags in the address bar of chrome and hit enter. This link will lead you to the Chrome Flags options that are devoted to tests options.
• Search for QUIC: In the search bar on the top of the Flags page, type in “QUIC” and this will take you to the QUIC protocol setting.
• Disable QUIC: It means that you have to look for “Experimental QUIC protocol”. Afterward, it comes to the slot next to it where a dropdown list appears, and you choose the “Disabled” option.
• Restart Chrome: When the QUIC protocol is turned off, close any Web Browser which you are using and open it again to apply the changes.

This method prevents Chrome from using the QUIC protocol which can help if the issue under discussion was connected with this protocol and resulted in the occurrence of the ERR_QUIC_PROTOCOL_ERROR.

Disable Chrome Extensions

At other times, the extensions can affect the normal running of the browsers and interfere with the protocols in the network thus increasing errors. Disabling your extensions can help identify if one of them is causing the issue:

• Open Extensions Page: Open the Chrome browser and in the address bar, type chrome://extensions/ and hit the Enter button. This will take you to the Chrome Extension page and there you will be able to find installed extensions.
• Disable All Extensions: Disable all the extensions by turning off the switch the is next to each extension. This temporarily disables them.
• Restart Chrome: After disabling the extensions, you should close the browser and then open it again.
• Check the Issue: Attempt to open the website that was giving the ERR_QUIC_PROTOCOL_ERROR. Given that the error is squashed, then one of the extensions must be a prime suspect.
• Identify the Problematic Extension: Disable all the browser extensions and then one by one enable them while restarting the browser and checking if the error is resolved or not till you enable the particular extension that is causing the problem.

That extension you discovered can be uninstalled or modified once you have identified it.

Check Proxy Settings in Windows

Such cases include application of the incorrect or outdated proxy setting as a reason behind this issue. This is how you can do the locales on a corporate workstation and view and change the Windows proxy settings.

• Open Settings: Hold the Windows button on your keyboard and type in “Settings” then hit the Enter button.
• Network & Internet: Network & Internet is un-clicked and will be right under it in the left’s side pane and this is under settings.
• Proxy: Then go to the Proxy option which is situated in the left hand side of the window.
• Automatic Proxy Setup: Be particular about the “Automatically detect settings” setting to guarantee that its checkbox is checked. This enables Windows to automatically detect proxy settings.
• Manual Proxy Setup: If you have any proxy set for the ‘manual proxy settings’, you would need to cancel it by unticking, ‘use a proxy server’.
• Apply Changes: Press on the “Save” button and then that will close the Setting’s window automatically or else simply the Setting’s window can be closed. After making these settings, close down your computer in order to apply these settings.
• Test Chrome: Launch the Google Chrome and see if the error code: ERR_QUIC_PROTOCOL_ERROR is still there? Most of the time, network problems may be solved by tweaking the proxy settings.

Conclusion

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