SSL (secure sockets layer) is an internet protocol which is used to encrypt data between a web server and a user’s browser. The purpose of using SSL is to make sure that the information is only readable to sender and receiver and to prevent unauthorized access. An SSL connection error or err_SSL_protocol_error occurs when a web browser cannot authorize a website’s SSL certificate which results in a failed secured connection between user’s web browser and web server.
Security certificate error may also occur when the website you want to visit is having an SSL certificate using SHA-1 encryption algorithm which your browser don’t support.
Fixing SSL connection error or err_SSL_protocol_error
- Open Google Chrome.
- In the address bar type chrome://flags/#enable-quic
- Enable Experimental QUIC protocol by selecting enable from the drop down list.
- Click Relaunch Now button located at the bottom of the page.
After restarting Google Chrome, open that website again to check whether the problem is solved or not.
Second Method to fix SSL protocol error
If the above method doesn’t work for you try this method to fix security certificate errors by following these instructions.
- Click on the system clock (bottom right of screen).
- Click date and time settings.
- Make sure your device’s date and time are correct and it is set to automatically update.
The reason behind this is that an SSL certificate has an expiry date and if your computer’s date and time settings are not correct then your browser will consider the SSL certificate as expired and show you an error message.