Chrome network error · -201 · Certificate

ERR_CERT_DATE_INVALID

The website’s certificate has expired or is not valid yet, judged by your device’s clock.

Chromium's description

The server responded with a certificate that, by our clock, appears to either not yet be valid or to have expired. This could mean:
1. An attacker is presenting an old certificate for which they have managed to obtain the private key.
2. The server is misconfigured and is not presenting a valid cert.
3. Our clock is wrong.

Chrome shows it as net::ERR_CERT_DATE_INVALID, error -201. puppeteer and Playwright report the same name when a page fails to load in Chromium.

Common causes

The site’s certificate expired and was not renewed.
Your device’s date or time is wrong.
An outdated operating system that does not know current root certificates.

How to fix ERR_CERT_DATE_INVALID

Check the device’s date, time and time zone.
Update the operating system and browser.
Site owners: renew the certificate and automate renewal (Let’s Encrypt with certbot or your host’s auto-renew).

ERR_CERT_DATE_INVALID in the screenshot API

Certificate errors do not stop a render: the API's browser accepts the certificate and captures the page the server sends, so a screenshot of a site with this error works. It does not tell you whether the certificate is valid; use an SSL checker for that.

Only the page's own load can fail a render. An image, script or frame of the page that fails with a network error does not: the page is captured as the browser shows it without that resource.

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Frequently asked questions

What does ERR_CERT_DATE_INVALID mean?

The website’s certificate has expired or is not valid yet, judged by your device’s clock.

How do I fix ERR_CERT_DATE_INVALID?

Check the device’s date, time and time zone.

Is a screenshot that fails with ERR_CERT_DATE_INVALID billed?

The render is not stopped by this error: the API's browser accepts the certificate, and the screenshot counts like any other. Only requests the API answers with an error are not billed.

Other common errors

ERR_CONNECTION_RESET ERR_CONNECTION_REFUSED ERR_CONNECTION_TIMED_OUT ERR_CACHE_MISS ERR_ADDRESS_UNREACHABLE ERR_TIMED_OUT ERR_SSL_PROTOCOL_ERROR ERR_CONNECTION_CLOSED ERR_QUIC_PROTOCOL_ERROR ERR_NAME_NOT_RESOLVED ERR_TOO_MANY_REDIRECTS ERR_NETWORK_CHANGED

All 249 Chrome network errors · Screenshot API errors

Screenshot API

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