Chrome caches certificates. A corrupted cache triggers this error.
The term ERR_PROXY_CERTIFICATE_INVALID is actually a used primarily in the Google Chrome/Chromium browser source code (and by extension, other browsers like Edge or Brave). It is not typically the title of academic literature.
The ERR_PROXY_CERTIFICATE_INVALID error is a Chromium-specific network error (code -136) that occurs when a browser fails to establish a secure connection with an because the proxy's SSL/TLS certificate is untrusted or improperly configured. 🔍 Technical Root Causes err_proxy_certificate_invalid
Whenever I use a secure proxy with Google Chrome I get ERR_PROXY_CERTIFICATE_INVALID , I tried a lot of different scenarios and ve... Super User 7 sites Fix SSL Connection Errors on Chrome : Cannot Connect to Real Google How to Fix SSL Connection Errors? * Confirm Date and Time of Your PC. ... * Verify certificate expiry. ... * Ensure SSL has been i... SSL2BUY Chrome Net Export Log | PDF - Scribd 364,"ERR_PROXY_AUTH_UNSUPPORTED":-115,"ERR_PROXY_CERTIFICATE_INVALID":- 136,"ERR_PROXY_CONNECTION_FAILED":-130,"ERR_PROXY_HTTP_1_1... Scribd How to Fix the NET - Kinsta Jun 6, 2025 —
This error differs from standard "Connection is not private" messages because the failure happens at the before the actual destination website is even reached. Chrome caches certificates
The error is a specific security warning in Chromium-based browsers (like Google Chrome, Microsoft Edge, and Brave) indicating that the SSL/TLS certificate used by your proxy server cannot be verified. Unlike standard SSL errors that affect a single website, this error typically blocks all outgoing traffic because the "middleman" (your proxy) is deemed untrusted. Core Causes of ERR_PROXY_CERTIFICATE_INVALID
Sometimes you accidentally leave a proxy enabled. It is not typically the title of academic literature
You are using a proxy (often a work VPN, antivirus software, or a malicious network), and that proxy is trying to spy on your secure traffic with an invalid security badge.