Do you keep seeing ERR_SSL_PROTOCOL_ERROR repeatedly while attempting to access a website or web page in Google Chrome? This is usually due to problems with the browser’s use of the website or page SSL protocol (Secure Socket Layer) To establish a secure connection to the site.

Similar to Another SSL connection is er rors in Chrome, ERR_SSL_PROTOCOL_ERROR doesn’t necessarily mean that the error originates from the server-side (although that’s a possibility). Check out the following troubleshooting suggestions to see if the error can be fixed by you.

Fix err_ssl_protocol_error on chrome

Adjust the System Date & Time

Having the date and time set up inaccurately on your computer is a common reason for the ERR_SSL_PROTOCOL_ERROR in Chrome. Therefore, it’s always a good idea to kick things off by syncing the Date & Time settings on your PC or Mac with the Microsoft or Apple servers.

Adjust Date & Time on PC

1. Right-click on the taskbar clock in the upper right corner.

2. Select Adjust date and time.

3. Next, turn on the switches Set time automatically and Set time zone automatically You can sync your Microsoft server’s date/time with your personal computer.

Fix err_ssl_protocol_error on chrome

Adjust Date & Time on Mac

1. You can open the System Preferences app.

2. Select Date & Time.

3. Please select the Lock Enter your Mac’s administrator password by clicking the ico.

4. Next to the boxes, enable the checkboxes Set date and time automatically and Set time zone automatically using current location Please see the Date & Time and Time Zone tabs. This should cause your Mac to retrieve accurate time and date data from Apple servers, based on where you are located.

Fix err_ssl_protocol_error on chrome

Clear your Chrome Browser cache

You can delete your Chrome browser cache, site settings and then proceed to the next step.

1. Open Chrom.

2. Press Control + Shift + Delete (PC or Command + Shift + Backspace Chrome can be loaded on a Mac Clear browsing data pop-up pane.

3. Change to the Advanced Tab and Select All Time on the Time range drop-down menu. Next, look at the boxes to the right:

  • Cookies and other site data
  • Cached images and files
  • Site settings
  • Hosted app data

4. Select Clear data.

Fix err_ssl_protocol_error on chrome

Clear SSL State (PC Only)

The browser cache in Chrome is not the only thing that can be cleared to resolve SSL-related issues. It is possible to do this via Internet Properties Control Panel applet.

1. You can open the Start Menu (or Press) Ctrl + SType and ) Internet Options. Open to load Internet Properties.

2. Change to the Content tab.

3. Select Clear SSL Cache.

Fix err_ssl_protocol_error on chrome

Change the URL of your website

Sometimes, typing the URL with or without the WWW (World Wide Web) prefix can trigger the ERR_SSL_PROTOCOL_ERROR. You can modify the URL to see if it helps.

1. To reveal the full URL, double-click Chrome’s searchba.

2. You can add or subtract the www prefix.

3. Press Enter.

Fix err_ssl_protocol_error on chrome

Flush DNS Cache

A corrupt DNS (Domain Name Service), cache Website loading issues can occur if you have a Mac computer or a PC. It is important to remove it before you try again loading the site.

Flush DNS Cache for PC

1. Click the right-click Start Click here to select Windows PowerShell (Admin) or Windows Terminal (Admin).

2. The following command is required:

ipconfig /flushdns

3. Press Enter.

Fix err_ssl_protocol_error on chrome

Mac Flush DNS Cache

1. You can open the Launchpad Choose and Other > Terminal.

2. The following command is required:

sudo killall -HUP mDNSResponder

3. Press Enter.

4. Geben Sie das Administrator Password for your Mac.

5. Press Enter again.

Fix err_ssl_protocol_error on chrome

Virtual Private Networks can be deactivated

Virtual Private Networks, (VPNs), They can help you protect your online privacy, but can also block Chrome’s ability to verify a website’s authenticity. If you are using a VPN to protect your privacy online, disable it and reload the website.

Install an automatic proxy

Another way to fix ERR_SSL_PROTOCOL_ERROR in Google Chrome involves disabling automatic or manual proxies.

Setting up Open Proxy

1. You can open the Chrome Select menu by clicking on three dots in the top-right corner of your window Settings.

2. Select Advanced > System You can find the sidebar.

3. Select Open your computer’s proxy settings.

Fix err_ssl_protocol_error on chrome

Proxy settings for PC

Next, turn off the switch Automatically detect settings You should disable setup scripts and manual proxies.

Fix err_ssl_protocol_error on chrome

Proxy settings for Mac

All boxes beneath the box should be unchecked Select a protocol to configure section.

Fix err_ssl_protocol_error on chrome

Deactivate Chrome Extensions

Chrome extensions can cause many site-related problems. Click here to go to Chrome’s Extensions screen More Tools > Extensions on the Chrome menu), disable all active extensions, and check if the ERR_SSL_PROTOCOL_ERROR recurs. If the problem extension doesn’t recurs, you can isolate it and disable it.

You can disable the QUIC Protocol

Google Chrome defaults to a low latency protocol known as QUIC in order to increase website connections. SSL errors can occur due to this protocol. It can be disabled via Chrome’s experimental feature pane.

1. Enter the following in Chrome’s address field:


2. Press Enter.

3. Next to the pull-down menu, open it Experimental QUIC Protocol and select Disabled.

4. Select Relaunch.

Fix err_ssl_protocol_error on chrome

If the site continues to generate the ERR_SSL_PROTOCOL_ERROR, reactivate the QUIC protocol before moving on with the rest of the fixes.

You can check the Files of Hosts

Editing your computer’s host file can be a problem. Remove any references to the domain name or IP address. Find out how to Modify the host file of your PC and Mac.

Google Chrome: Update

Unsupported Chrome versions can make it difficult for the browser to establish a secure connection with a site. You can update your browser to see if it makes any difference. Open the Chrome Menu and selection Help > About Google Chrome.

Fix err_ssl_protocol_error on chrome

Disable Antivirus & Firewall

Are you using an internet security tool or third-party antivirus software on your Mac or PC? It is best to disable it, and then check that the website loads properly. Add the website to your antivirus exceptions. For more information, consult the online documentation of the utility or the user manual.

Notify Webmaster of the site

If the ERR_SSL_PROTOCOL_ERROR persists in Chrome (and also other web browsers such as Firefox, Edge, Safari, etc. It’s important to inform the administrator or website owner about this issue. Webmasters should check their hosting accounts for problems with the SSL certificate. If they are having trouble, contact the support department at the provider.

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