8 Things to Do When Experiencing ERR_SSL_PROTOCOL_ERROR: Verify SSL Certificate (DNS settings haven’t fully propagated yet). Check the System Time and Date. Clear Browser Cache and Cookies. Disable Browser Extensions.
The error code that is displayed at the bottom of the message, which is basically the Mozilla code for ERR_SSL_PROTOCOL_ERROR, is the following: SEC_ERROR_UNKNOWN_ISSUER This implies that the issuer of the SSL security issuer is not recognized by the browser. Microsoft Edge
By default, Microsoft Edge allows you to override urgent security warnings for sites that propagate SSL errors or ignore marriage certificate errors.
As the name suggests, an SSL protocol error occurs when virtually no web browser is able to establish a secure connection. Of course, this is a website made possible by an SSL certificate.
Google Chrome is one of the most widely used and trusted browsers for the majority of internet users. However, sometimes you may encounter the SSL error “This website cannot establish a secure connection -” err_ssl_protocol_error while browsing the web. Refreshing the web page (F5 key) may fix the problem, but in some cases, you definitely need to take additional steps to fix the problem.
Among them, there has always been an error that users often encounter: SSL security error “This website cannot provide an easy connection”, also known as “ERR_SSL_PROTOCOL_ERROR”. Usually this SSL error message disappears on its own after refreshing the Facebook page, but sometimes it doesn’t and it keeps reappearing.
Why am I getting this error Err_ssl_protocol_error?
If the date on your computer does not match the date on the website you are trying to access, you will encounter the On err_ssl_protocol_error issue in Chrome browser. The way to solve this problem is very simple – now set your computer’s date to the current date and then use the website that opens.
What does Err_ssl_protocol_error mean?
Errors that are sorted more frequently include “ERR_SSL_PROTOCOL_ERROR” software error messages that inform the browser user that the secure network connection to the server it is communicating with may have failed.
What causes Err_ssl_protocol_error?
The most common causes known to most: Some system dates or times are always correct. The IP address or business address of a website is blocked by a firewall on the one hand and an antivirus program on the other. SSL/TLS connections are usually blocked by a firewall or trojan.
How do I fix Err_ssl_protocol_error?
How to Fix “ERR_SSL_PROTOCOL_ERROR” for Google Chrome
- Check the system date.
- Clear browsing data.
- Clear the SSL status.
- Turn off the Chrome QUIC protocol.
- Check your antivirus settings.
- Check your firewall.
- Disable extensions.
- Adjust your Internet security and privacy.
What does this mean ERR_SSL_PROTOCOL_ERROR?
If an SSL-secured website is being viewed in the Google browser and the convenient connection fails, a new message “ERR_SSL_PROTOCOL_ERROR” is displayed. These are the rules for how Chrome notifies the user of a possible issue preventing the expected exchange of certificates.

Ermias is a tech writer with a passion for helping people solve Windows problems. He loves to write and share his knowledge with others in the hope that they can benefit from it. He’s been writing about technology and software since he was in college, and has been an avid Microsoft fan ever since he first used Windows 95.