Causes of ERR_SSL_VERSION_OR_CIPHER_MISMATCH

By WpClerks

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Older TLS or SSL protocol versions used by the web server would not be compatible with new versions of web browsers, and older versions of web browsers or operating systems do not support newer TLS versions. This can result in err SSL version or cipher mismatch.

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Websites that use Cloudflare CDN, a content delivery network, experience the err ssl version or cipher mismatch error due to differences in security protocols.

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Browsers verify SSL certificates to identify the website’s authenticity during TLS handshake. If the SSL certificate of the domain is obsolete or doesn’t align with the browser encryption methods, it is likely to restrict the website.

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