ERR_CERT_CONTAINS_ERRORS -203

Net error -203

BROWSER

The server responded with a certificate that contains errors.

Browser error page with a network error code and a checklist of likely causes
Browser network errors: rule out your connection first, then the site.

What it means

ERR_CERT_CONTAINS_ERRORS is a Browser error code reported by Google Chrome, Microsoft Edge and other Chromium browsers. Its official message is: “The server responded with a certificate that contains errors.”

How to fix ERR_CERT_CONTAINS_ERRORS

  1. Reload the page once — single transient failures heal themselves immediately
  2. Flush DNS: 'ipconfig /flushdns' on Windows, 'dscacheutil -flushcache' on macOS
  3. Disable VPN, proxy settings and your antivirus web shield, then retry
  4. Test the same page from mobile data or another device to isolate YOUR setup from the site
  5. Bypass performance extensions: open a private window, disable ad-blockers and retry

Related errors

ERR_CERT_AUTHORITY_INVALIDERR_CERT_DATE_INVALIDERR_CERT_COMMON_NAME_INVALIDERR_CERT_REVOKEDERR_CERT_NO_REVOCATION_MECHANISMERR_CERT_UNABLE_TO_CHECK_REVOCATIONERR_CERT_INVALID

Source: Chromium net_error_list.h

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