Many antivirus tools act as a hidden proxy.
If none of that works, a corporate firewall is the culprit. Call your IT helpdesk and tell them, “I need your SSL inspection certificate installed.” err_proxy_certificate_invalid
The ERR_PROXY_CERTIFICATE_INVALID error is frustrating because it blocks everything. But 90% of the time, the fix is simple: Many antivirus tools act as a hidden proxy
However, there is significant research regarding the security of proxy certificates, man-in-the-middle inspections, and TLS errors. Below is the likely context of the term and relevant papers in this domain. the fix is simple: However