ERR_SSL_PROTOCOL_ERROR error in Google Chrome: causes and solutions

Although Google Chrome is the browser most used by users worldwide, errors such as ERR_SSL_PROTOCOL_ERROR are common. Which corresponds to a failure in the security protocol of the site you are accessing. This can occur due to a problem in the device from which you are browsing or in the web page that you are trying to enter.

In this sense, the causes that cause this error in Chrome can be solved quickly. For this, there are different methods or strategies that you can use, among which are changing the date and time of the device (when it is a computer), deactivating the antivirus (Windows 10) or clearing the DNS cache of the browser. Each of these alternatives are explained in the following post.


The ERR_SSL_PROTOCOL_ERROR error in Google Chrome can be due to various causes. Which range from a wrong configuration in the date and time of the device you are using, to a corrupted hosts file or an error in the QUIC protocol that causes it to block the connection between the server and the computer.

However, there are other reasons behind this browser failure. Such as a web or IP address blocked by a firewall or antivirus, a browser’s DNS cache that is already out of date, etc.


In order to find a solution to the ERR_SSL_PROTOCOL_ERROR error of the browser, you must first determine what is the failure or cause of it. Pay attention to the following list and try the different alternatives one by one, until you can get it.

Restart router or internet router

This is the most logical and feasible option in many cases. Just turn off the router, wait about 10 seconds, and turn it on again. This should quickly fix the ERR_SSL_PROTOCOL_ERROR error . In case it works, it was just a momentary internet server failure. Otherwise, keep trying the following list of alternatives.

Correctly set the time and date of the device

One of the most common causes for this protocol error is a misconfiguration of the device date and time. This interferes with the browser’s communication, preventing it from correctly loading SSL connections, since this information is necessary in this process.

Therefore, if both the date and time of the computer are wrong, it is possible that there is an ERR_SSL_PROTOCOL_ERROR error in your browser. So, to fix it, you will have to adjust it by following these steps:

  1. Click on the time and date icon on your computer’s task bar.
  2. Press ” Change date and time settings … “.
  3. Select ” Change date and time.”
  4. This will open a new window in which you will have to change the date and time of the computer based on the time zone of the country or state in which you are.

Once you finish, click ” OK ” and close the pop-up window. In this way the ERR_SSL_PROTOCOL_ERROR error should disappear, check that it is and, if not, try any of the following options.

Clear SSL and browser cache

Sometimes the data stored in the SSL cache and in the browser, tend to cause errors in the browser, including ERR_SSL_PROTOCOL_ERROR. So, in this circumstance, what is recommended to do is delete all the information corresponding to this category.

To do this, you need to follow the instructions described below, for each of the cases:

  1. Go to the Google options menu ( the three dots vertically ).
  2. Select ” Settings.”
  3. Scroll until you find the “ Privacy and security ” section and click on “ Clear browsing data”.
  4. Pull down the ” Time Interval ” menu and select ” Since Always “.
  5. Click on ” Clear data.”

Now you must clear the SSL cache, for this you must:

  1. Follow the path Start> Control Panel> Network and Internet> Internet Options. Note : In case the control panel menu is shown in large icons, you will only have to click on ” Internet Options “.
  2. Click on the ” Content ” tab .
  3. Now click ” Clear SSL status “.

When everything is done a notification will be displayed on the computer screen. Now you will be able to verify if the ERR_SSL_PROTOCOL_ERROR error has been solved, accessing the web that produces the problem again.

Other alternatives

Although the methods described above are the most effective to fix this error in the browser, the cause may not be found in any of them. In this case you will have to try other alternatives such as deactivating the antivirus, repairing the QUIC protocol or any of those described below.

Disable Windows 10 antivirus

Another cause for this failure in the browser lies in the firewall or in the Windows 10 antivirus. If you have a computer with said Operating System, this “protector” could detect during the SSL / TLS protocol analysis that it is an unsecured website and, therefore, prevent access.

Therefore, to verify that this is or is not the problem, you must deactivate the antivirus or the firewall of the computer for a few moments. This, although it will leave your computer vulnerable to attacks while it is disabled, could clear your doubts.

Disable browser extensions

Although Chrome extensions serve to improve the experience and facilitate tasks in the browser, any change in the original programming of the same can cause crashes and generate errors such as ERR_SSL_PROTOCOL_ERROR. In these types of cases, what is recommended is to temporarily disable any extension you have installed.

To do this you must go to the Google menu (the three dots), click on ” More tools ” and click on the ” Extensions ” option . Once inside the settings, disable all the extensions you have in the browser and restart it to verify that the error has disappeared.

Disconnect QUIC protocol

The QUIC protocol was implemented to give additional speed to browsers when connecting to the network, including Google Chrome. This is activated by default in Google Chrome and may be the cause of the ERR_SSL_PROTOCOL_ERROR error .

To solve this problem, go to the path chrome: // flags / # enable-quic from the address bar of the browser and deactivate the protocol in question.

Reset or delete hosts file

In addition to everything mentioned above, there is one last option that you can implement to fix the ERR_SSL_PROTOCOL_ERROR error in Google Chrome. Which consists of repairing the hosts file or deleting it from the computer. To do this, you must go to a specific path on the local disk and, from there, follow a process using the Windows text editor.

With everything described so far, the error that your browser presents should be solved. However, to get a clearer idea of ​​each process, watch the following video.


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