What causes err_ssl_protocol_error and how can I fix it?

[charlesrich]

I get err_ssl_protocol_error when trying to open several websites in Chrome. I’ve cleared cache, checked my system date/time, and disabled extensions, but the error keeps appearing. Looking for step-by-step fixes and how to diagnose whether it’s a site issue, browser setting, or network problem.

 

[sophiadasy]

The ERR_SSL Protocol error is often caused by the inability of your browser to connect with a web site on a secure connection. You have cleared the cache already, verified the date and time and even disabled extensions; therefore, you can do a couple of additional steps. First, verify your internet security or anti-virus, which at times blocks the SSL- disable them to get through. Ensure that you have the latest version of the Chrome browser, and clear the state of the SSL by accessing Settings Advanced Privacy and Security Clear SSL state. Another one to test is to use another network, such as a different Wi-Fi network or mobile hotspot, to determine whether the problem is with your router or your Internet service provider. Finally, check the SSL certificate of the site with an SSL Checker. In case all these measures are unsuccessful, the issue may lie at the end of the web site.

 

[niyati]

The inability to access a website via a secure connection with your browser is a common cause of the ERR_SSL Protocol error. You have already cleared the cache, checked the date and time and even switched extensions off; therefore, you can take a couple of steps further. First, check your internet security/ anti-virus, which sometimes blocks the SSL- disable those to bypass. Make sure your version of the Chrome browser is up-to-date, and empty the state of the SSL, going to Settings, Advanced Privacy and Security Clear SSL state. The other one that can be tested is to connect to a different network, like a different Wi-Fi network or a mobile hotspot, to see whether the issue is related to your router or your Internet service provider. Lastly, verify the SSL certificate of the web page using an SSL Checker. The problem could be in the terminus of the website in case all these measures fail.

 

[isabel]

The ERR_SSL_PROTOCOL_ERROR tends to be an error of browser settings to SSL, problems with certificates of the site, or block of the network. Including trying to update Chrome, clearing the state of the SSL, disabling antivirus/firewall, or even trying the site on a different device should help tell whether it is the site or your configuration.

 

[SK_Tech]

I’ve seen ERR_SSL_PROTOCOL_ERROR a bunch when browsing—basically the browser can’t establish a secure HTTPS connection. Common causes I’ve run into:

• System or browser clock is wrong (SSL certificates depend on correct time).
• Outdated browser or cached SSL data.
• Antivirus/firewall or VPN interfering with the connection.
• Issues on the website’s server side (expired certificate or misconfiguration).

Fixes that usually work for me:

1. Make sure your date and time are correct.
2. Clear browser cache/cookies and close/reopen the browser.
3. Update your browser to the latest version.
4. Temporarily disable any VPN or antivirus HTTPS scanning to test.
5. Try a different browser or device—if it’s still broken, it’s likely the website’s certificate.

Most of the time, correcting the clock or clearing the SSL state does the trick.

 

[marcowayne]

The **SSL Protocol error which is the err_SSL_ PROTOCOL error generally occurs owing to problems with the browser/network configuration or the certificates of the second and third level. Here’s how to fix it:

1. Test the site- Open it in a different browser or a different device, and determine whether it is a site problem.
2. Clear state of SSL- Chrome Settings Advanced Privacy and Security Clear state of SSL.
3. Updates Chrome- ensure that the browser is up to date.
4. Check antivirus/firewall- Some antivirus/firewall applications prevent connecting via SSL, disabling it temporarily may be necessary.
5. Restart network configuration- In windows, issue the commands ipconfig / flushdns and netsh winsock reset in Command Prompt.

In case it is operating on another browser or gadget, then it is probable that it is a Chrome/browser problem. Otherwise, it can be a network or site issue.

 

[danisjohn]

ERR_SSL_PROTOCOL_ERROR happens because of problems with the SSL / TLS handshake, an old browser, wrong system date/time, and server settings. Fix: the browser cache, browsers, and date/time settings, as well as disable the QUIC protocol and make sure the site has an SSL certificate. Attempting access through a different network or a different device can help to overcome persistent access.

 

[Gsusangrey]

The ERR_SSL_PROTOCOL_ERROR normally indicates that your browser is not able to connect to the site in a secure manner. It is usually brought about by inaccurate systemtime, antivirus/firewall interference or old browser/OS. Fix it by checkingthedate/time, turning offsecuritysoftwaretemporarily and updating.

 

[Lucas]

ERR_SSL_PROTOCOL_ERROR happens when a secure connection fails, often due to wrong date/time, browser issues, antivirus blocks, or outdated TLS; fix it by updating your browser, clearing cache/SSL state, checking date/time, and temporarily disabling antivirus.

 

[meenakshi]

The ERR_SSL_PROTOCOL_ERROR occurs due to issues like incorrect date/time, outdated browser, cached data, or SSL misconfiguration. Fix it by syncing your system clock, clearing cache, updating the browser, disabling conflicting extensions, or checking site/server SSL settings.

 

[sophie]

When the secure HTTPS connection cannot be established, ERR_SSL_PROTOCOL_ERROR appears due to the incorrect system date/time, the old version of the browser, the corrupted cache, the antivirus programs interference, or the errors with the server SSL. Remedy by updating the browser, clearing cache, changing the date/time, turning off the scanning of the site using the SSL or simply calling the site.

 

[mayank]

The ERR_SSL_PROTOCOL_ERROR occurs due to SSL/TLS issues, such as outdated browser, incorrect system date/time, corrupted cache, or incompatible SSL settings. Fix it by clearing cache, updating the browser, checking system time, disabling QUIC, or renewing SSL certificates.

 

[simran]

The ERR_SSL_PROTOCOL_ERROR is caused by SSL handshake failures due to browser, network, or certificate issues, and can be fixed by clearing cache, updating browser, checking system date, or adjusting SSL settings.

 

[jainnorton]

The ERR_SSL_PROTOCOL_ERROR means the SSL/TLS handshake has failed. It can happen due to your system's incorrect date/time setup, an outdated browser, conflicting antivirus software, a cached browser with corrupted files, or problems with the website's SSL certificate.

 

[Rathore]

ERRORSSL Protocol Error occurs due to issues with the SSL / TLS handshake, outdated browser, incorrect system date/time, and server configuration. Fix: browser cache, browsers, date/time settings, and also turn off the QUIC protocol and ensure that the site has an SSL certificate. Persistent access can be overcome by trying to access with the help of another network or an alternate device.

 

[Nikhil Rajoria]

Reasons: Bad date/time, old browser, bad SSL cache, misconfigured server.
Fixes:

1. Sync system date/time
2. Clear the SSL state in the browser
3. Update browser
4. Turn off other antivirus/firewall software.

 

[royjasika]

The ERR_SSL_PROTOCOL_ERROR occurs due to incorrect system date/time, outdated browser, invalid SSL certificates, or firewall/antivirus blocking connections. To fix it, update date/time, clear browser cache, disable conflicting extensions, check SSL settings, and restart network devices. If unresolved, contact the website administrator for certificate issues.