HTTP/2 protocol error
Author: ISSIOCreated Sep 12, 2025Updated Sep 29, 2026
Labelskind/triage
Problem Description
When visiting some websites, this error suddenly occurred today. HTTP/2 protocol error HTTP/2 protocol error: Invalid input ConnectionInputs.RECV_DATA in state ConnectionState.CLOSED System Information Mitmproxy: 12.1.1 Python: 3.12
url: https://tools.scrapfly.io/api/fp/ja3 https://tls.browserleaks.com/json
System Information
Checklist
- This bug affects the latest mitmproxy release.
Source: mitmproxy/mitmproxy