12/9/2023 0 Comments Synology sync mac![]() Check for Old TLS versionĪnother possible reason is that the TLS version running on the web server is old. That is where a tool like SSL Labs can come in handy. However, in our case, the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error actually prevented us from being able to check it in Chrome DevTools. Remember though, there are wildcard certificates and other variations, but for a typical site, it should match exactly. If this doesn’t match the current site you’re on, this is a problem. Right-click anywhere on the website and click on “Inspect.” Then click on the security tab and click on “View certificate.” The issued domain will show in the certificate information.
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