# ERR_SSL_PROTOCOL_ERROR What is Error and How to Fix?

https://www.nettescil.com.tr/knowledgebase/article/err-ssl-protocol-error-what-is-error-and-how-to-fix

**ERR_SSL_PROTOCOL_ERROR**during access to a website SSL (Secure Slot Layer) is an error that occurs when there is a problem related to the protocol. This error is usually in the browser **“This site cannot be reached”** or a similar message is observed. This problem is browser, server or SSL can be caused by a technical problem regarding the certificate.

**ERR_SSL_PROTOCOL_ERROR Causes of Error**

1st**Passed or Time Dollen SSL Certificate**

Website SSL The certificate may be invalid or expired.

2. 2.**Browser and Server Incompatible**

The browser offers the server SSL/TLS can not support the protocol.

3. .**False Date and Time Settings**

If the date and time settings of your device are not correct, SSL certificates may not be verified.

4. .**Security Wall or Antivirus Program**

Security software SSL can prevent traffic.

5. 5.**Server Configuration Errors**

Wrongly configured on the server SSL Certificate or missing SSL can support.

6. 6.**Old Browser Use**

If the browser is not up-to-date, modern SSL/TLS may not support protocols.

1st**Check Date and Time Settings**

Make sure the date and time of your computer or mobile device is correct. False settings SSL can affect the verification process.

2. 2.**Update Your Browser**

Download and install the latest version of the browser you are using. Current browsers, modern SSL/TLS supports protocols.

3. .**Clean Browser Cache and Cookies**

• Go to adjuster.

• Clean cookies and cookies.

• Re-visit the website from the moment.

4. .**Check Firewall and Antivirus Programs**

• Anti-virus or firewall software SSL Check whether it prevents traffic.

• Deactivate and try to access the website.

5. 5.**Use a Different Browser or Device**

Access the website with another browser or device to check whether the error is private to the browser.

6. 6.**SSL Re-Delete or Control the Certificate**

If the problem is related to your website:

•SSL Check that your certificate is valid.

• Try re-installing the initiative.

• Verify your server configurations.

7. 7.**Do Not Track Secure Connection (Permanent Solution)**

temporarily to the website HTTP You can try to access via. But this method is not safe and is not recommended in the long run.

8. 8.**Check Server Updates and Supported Protocols**

Your Server TLS 1.2 Or TLS Make sure it supports modern protocols such as 1.3.

**ERR_SSL_PROTOCOL_ERROR Tips to Prevent Error**

•SSL Make sure your certificate expires and renew it regularly.

• Check your website’s server configurations.

• To provide a safe experience for your users SSL Do regular controls using certificate testing tools.