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July 20, 2025The Problem: GitHub Copilot Chat Connection Failures If you’ve been using GitHub Copilot chat and suddenly started seeing connection errors like this, you’re not alone:
1 2 3 Sorry, your request failed. Please try again. Request id: 87abdca6-5e14-4cd0-953c-c9d9896fea2a Reason: Please check your firewall rules and network connection then try again. Error Code: net::ERR_HTTP2_PROTOCOL_ERROR. I’ve been there—working perfectly fine one day, then hitting these frustrating HTTP2 protocol errors the next. The error message suggests checking firewall rules and network connections, but the real culprit is often something else entirely.