JANUARY 20th: Claude Code Web/Mobile: "Repository or branches not found" — persistent 404 on git_proxy endpoint

[ChrispyKreme86]

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• This is a single bug report (please file separate reports for different bugs)
• I am using the latest version of Claude Code

What's Wrong?

Claude Code Web (claude.ai/code) and iOS app consistently fail with "An error occurred while executing Claude Code" on every session. This has been happening for 11 days straight.

The browser console shows:

• 404 errors on /v1/session_ingress/…/git_proxy/compare endpoint
• [REACT_QUERY_CLIENT] QueryClient error: Repository or branches not found — repeated 19+ times on page load alone
• These errors appear immediately on page load before any user interaction

Key details:

• CLI (claude command) works perfectly — account, permissions, and API access are all fine
• Issue is isolated to web and mobile container/git proxy infrastructure
• Affects: Claude Code Web (claude.ai/code), iOS app, mobile Safari
• Tested across: Chrome, Safari, iPhone (iOS app + mobile browser)
• Troubleshooting attempted: cleared cache/cookies, new sessions, different browsers/devices, disconnected & reconnected GitHub, uninstalled & reinstalled GitHub app via claude.ai/code, removed API environment variables, logged out and back in
• Subscription: Max5
• Support ticket has been open for 11 days with no resolution

What Should Happen?

Claude Code Web sessions should load and execute normally, just as they do via the CLI. The git_proxy endpoint should successfully resolve repositories and branches.

Error Messages/Logs

// Console errors on page load (repeated 19+ times):
[REACT_QUERY_CLIENT] QueryClient error: a: Repository or branches not found
    at i (https://claude.ai/_next/static/chunks/64328-4c5e11db1e609c9b.js:1:16387)
    at queryFn (https://claude.ai/_next/static/chunks/17421-dd74836abff36950.js:1:22236)

// Network tab shows:
404 on /v1/session_ingress/.../git_proxy/compare

// UI error:
"An error occurred while executing Claude Code. You can try again by sending a new message or starting a new session."

Steps to Reproduce

1. Log into claude.ai with a Max5 subscription account (with GitHub connector enabled)
2. Navigate to claude.ai/code
3. Start a new Claude Code session
4. Send any message/request
5. Session immediately fails with "An error occurred while executing Claude Code"
6. Open browser developer console (Cmd + Option + J) to see 19+ "Repository or branches not found" errors and 404s on the git_proxy endpoint
7. This happens 100% of the time across all browsers, devices, and new sessions
8. CLI (claude command in terminal) works fine with the same account

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

Latest (issue is on web/mobile, not CLI)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

This issue has been reported to Anthropic support for 11 days (since Jan 20) with no resolution. Support ticket is open but standard troubleshooting (clear cache, remove API env vars, reinstall GitHub app, etc.) has not helped because the issue is server-side.

The errors occur on Anthropic's git proxy infrastructure — the /v1/session_ingress/.../git_proxy/compare endpoint returns 404, causing the React Query client to throw "Repository or branches not found" errors repeatedly. This happens before any user interaction, immediately on page load.

CLI access works perfectly, confirming the issue is specific to the web/mobile container execution environment and not account permissions or API access.

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Claude Code hangs when Git branch comparison is triggered #19621
2. [BUG] An error occurred while executing Claude Code #17888
3. Claude code execution failed #17290

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
• To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

[ChrispyKreme86]

Update (Feb 1): Additional debugging confirms this is a backend repo-mapping issue, not a general proxy failure:

1. Repo-specific — Other repos connect and work fine. Only this specific repo fails.
2. Old sessions still work — A session from early January connected to this same repo still functions and can push. Only new sessions fail.
3. Rename didn't help — Renamed the repo on GitHub; new sessions picked up the new name but still fail with the same 404. This rules out name-based routing issues and points to the internal repo ID mapping.
4. Fails before any interaction — After clearing the console and simply refreshing, the git_proxy/compare 404 and "Repository or branches not found" errors appear immediately. Sending any message triggers the same single 404 followed by an infinite React re-render loop.
5. Environment variables irrelevant — Tested with and without cloud environment variables; no effect.

This points to corrupted or stale repo metadata in the session ingress service for this specific repo ID. Client-side troubleshooting has been fully exhausted. Requesting backend/infrastructure team investigation.

[ChrispyKreme86]

Not a duplicate. Reviewing the three flagged issues:

• [BUG] Claude Code hangs when Git branch comparison is triggered #19621 — Intermittent git_proxy/compare 404 on Windows over 3 days. Not repo-specific. Different failure pattern.
• [BUG] An error occurred while executing Claude Code #17888 — Closest match: repo-specific failure where CLI works but web doesn't. However, that issue has minimal diagnostic detail and no resolution. This issue (JANUARY 20th: Claude Code Web/Mobile: "Repository or branches not found" — persistent 404 on git_proxy endpoint #22277) provides significantly more debugging evidence (console logs, rename test ruling out name-based routing, confirmation that old sessions still work while new ones fail, cross-repo testing confirming isolation to one repo).
• Claude code execution failed #17290 — Generic "Claude code execution failed" across all repos. Different problem entirely.

This issue documents a persistent, repo-specific backend failure with detailed reproduction steps and diagnostic evidence that none of the above issues contain. Keeping this open. See also cross-reference comment on #17888.

[ChrispyKreme86]

@bcherny any way to get more eyes on this?

[wensiyuanseven]

I have the same problem.

[ChrispyKreme86]

@wensiyuanseven its been over 2 weeks now and the agent assigned to this keeps giving me the run around, trying client side fixes that i have tried over and over. i can't seem to get through to anyone. have you had any luck?

[damudao]

I also have the same problem. Have been encountering it for nearly two weeks now. No luck getting through to anyone at Anthropic/ClaudeCode either.