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Fix ERR_SSL_PROTOCOL_ERROR On Chrome

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You’ve made this mistake on the Chrome browser several times when visiting a website. This error usually goes away when a website is updated. But there are times where you need an in-depth patch instead of simply refreshing a tab. We’ll demonstrate in this guide how to patch ERR SSL PROTOCOL ERROR in the Google Chrome browser. Learn more …

Please note: If you encounter this error on your own website before we move forward, then there is a different workaround that is required on a web server to execute.

In general, the error occurs when you visit a website and the site is unable to provide a safe ERR SSL PROTOCOL ERROR connection. The error is as if:

ERR_SSL_PROTOCOL_ERROR-on-Chrome

Guide to Fix Chrome’s ERR SSL PROTOCOL ERROR

There are many ways to repair this error on the browser, and the steps for the same are below.

  • Check the system’s date and time
  • Cookies and browser cache safe
  • Deactivate QUIC protocol
  • Check the antivirus settings
  • Strong Condition of SSL

The above steps include a detailed description for resolving the ERR SSL PROTOCOL ERROR on the Chrome browser. The basic steps below are …

Check the system’s date and time

As we know the date and time on your machine synchronizes with your server’s date and time. Our tech team has found that it throws this error on the Chrome browser several times if there is a mismatch of date and time.

So make sure that the date and time of your machine is set correctly to repair the ERR SSL PROTOCOL ERROR

Date-Time-Setting

Clear the browser cache and cookies

A copy of the website that you visit is still saved in the browser. This is the cache-memory method. Any change on the website server when you visit the website may not reflect on the client-side. Go to your browser settings to clear the cache and the cookies. It is observed that the error of ERR SSL PROTOCOL ERROR is resolved after clearing the cache and the cookies.

Clear-Browser-History

Deactivate QUIC protocol

The QUIC stands for protocol to Fast UDP Internet Connection. This is designed to reduce latency on any request a customer makes. By chance, QUIC had been switched on and disabling QUIC was observed to solve this problem.

Follow these steps to deactivate protocol QUIC

  • At the URL bar style chrome:/flags/#enable-quic
  • Go to Experimental QUIC protocol choice and select Trigger

Fix-ERR_SSL_PROTOCOL_ERROR2

Clear SSL state

There are instances when clearing the SSL state that will help fix this ERR SSL PROTOCOL ERROR error.

The measures below to clear SSL status are:

  • On your machine, click the Windows+ R button
  • Type inetcpl.cpl, the web properties window will appear below the content tab and press
  • CLEAR SSL STATE to solve the problem.

Fix-ERR_SSL_PROTOCOL_ERROR3

Check the Antivirus setup

The antivirus may also often prove to be a source of the ERR SSL PROTOCOL ERROR.

The antivirus’ aim is to search the web site for malicious content. There are often policies set to block the lower version of the SSL / TLS protocol because of which the error is shown. To cross-check this simply deactivate the antivirus and surf your website.

Fix Server-side ERR SSL PROTOCOL ERROR

If you’re a website owner then we also have a special guide that will help you correct this mistake. In this scenario, you must correct the server-side settings.

The steps below for fixing ERR SSL PROTOCOL ERROR on the server are.

  • Verify that the SSL certificate is correctly enabled. Try the same with SSL Checker.
  • Check that the server certificate matches the private key that was developed when CSR was being created. You can verify the same with the main matcher to the SSL certificate.
  • Check the list of server-configured protocols is compatible with the chrome, or not. The same can be tested here
  • Verify that the port is available and can accept HTTPS requests.
  • Check to see if the private key matches the public key.

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