“This webpage is not available” or ERR_SSL_VERSION_OR_CIPHER_MISMATCH Chrome displays this errors if some security codes are missing and the website is running with outdated SHA algorithm or system’s TLS version is outdated. To get rid of this error, contact the website administrator and ask him to reinstall SSL certificate on server with the updated version of SHA algorithm as SHA-2. The user also need to access website with highest version of TLS as TLS 1.2. For Chrome: Open chrome://flags Look for "Minimum SSL/TLS version supported." Choose SSLv3 Click on "Relaunch now" button Open your https page again You will be redirected to a "Your connection is not private" page. If you do not worry about this security issue click on the "Advanced" link. Finally click on "Proceed to <your https page> (unsafe)". Solved.
