Rank, 14 days: 234 on the Claude Code sheet
2 people reported
All time, since Oct 7.
Project thread worker registration 400
“Since about 2026-10-07 21:37 UTC, every claude.ai Project thread sent to run on my Mac fails to start ("Couldn't start").”
Is this your bug? What gets counted gets fixed. Pile on.
Paste this into your agent. It files your report, with your error and version.
I hit this bug: rapsheet.dev/sheets/claude-code/issues/6804/file Follow it to file my report. Show me the text before you send.
No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends
Project threads fail to start on Remote Control with 400 worker registration. Sessions dispatched from a claude.ai Project to the device get "Couldn't start"; sessions started locally with claude remote-control register normally.
Is this your bug?
File my report- Where
- Remote Control
- Error text
Error: CCR v2 worker registration failed for session cse_...: Request failed with status code 400- Versions
- 4.4212.0
- Platforms
- macOS
- How bad
- Breaks a normal workflow.
Not quite your bug?
- Remote Control HTTP 4034 people