What does Your connection is not private mean?

Chrome's full-page warning shown whenever certificate validation fails. It is not a single error — the real cause is the NET::ERR_CERT_* code printed underneath it, and that code tells you which of expiry, trust, or hostname is wrong.

Device-specific

Your connection is not private on Android

Why it happens on Android

An outdated root store on older Android builds rejects chains that current desktop browsers accept.

The fix on Android

Set date and time to automatic, update Android System WebView and Chrome, then retry. If only old devices fail, reissue the certificate against a longer-established root.

Is Your connection is not private happening on your domain?

Running the check from outside your device separates a real certificate problem from a local clock or network issue in one step.

Free, no signup. Runs from outside your network, which is the only way to tell a server fault from a local one.

If that didn't fix it

Android has its own failure mode, but Your connection is not private has a wider set of causes that apply everywhere. The most common one overall is: the certificate expired (net::err_cert_date_invalid).

All causes and fixes for Your connection is not private

Your connection is not private on other platforms and devices

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Last verified: 16 October 2026 by the Lemwatch research team.