[BUG] RPC error: ensure user: useradd failed — No space left on device

Preflight Checklist

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

What's Wrong?

RPC error: ensure user: useradd failed — No space left on device

What Should Happen?

Claude cowork was working on developing a webpage
The errors you're seeing are on Anthropic's infrastructure side — the container running your session has filled its disk. Here's what you can try, in order:

Quick things to try first:

1. Hard refresh the session — close the cowork tab completely, clear browser cache, reopen claude.ai and start a fresh project
2. Try a different browser — Chrome vs Safari sometimes gets a different container allocation
3. Try on desktop — the Claude Code desktop app at claude.ai/download runs more reliably than the browser-based version

If still broken:

1. Report it — file a bug at github.com/anthropics/claude-code/issues with the exact error text:

``
RPC error: ensure user: useradd failed — No space left on device
``
This gives Anthropic the signal to clean up stale containers for your account.

1. Email support — support@anthropic.com with your account email and the screenshot. They can manually reset your session state.

Root cause (for context):
The cowork session spins up a Linux container for your session. The container disk filled up — likely from previous work (ingesting those Pidilite PDFs is a likely culprit). When you start a "fresh" session it may be reusing the same container rather than getting a new one, hence why even new chats fail.

In the meantime: You're already set up here locally and the server is working — that's the more stable environment for this project anyway.

Error Messages/Logs

Steps to Reproduce

The errors you're seeing are on Anthropic's infrastructure side — the container running your session has filled its disk. Here's what you can try, in order:

Quick things to try first:

1. Hard refresh the session — close the cowork tab completely, clear browser cache, reopen claude.ai and start a fresh project
2. Try a different browser — Chrome vs Safari sometimes gets a different container allocation
3. Try on desktop — the Claude Code desktop app at claude.ai/download runs more reliably than the browser-based version

If still broken:

1. Report it — file a bug at github.com/anthropics/claude-code/issues with the exact error text:

``
RPC error: ensure user: useradd failed — No space left on device
``
This gives Anthropic the signal to clean up stale containers for your account.

1. Email support — support@anthropic.com with your account email and the screenshot. They can manually reset your session state.

Root cause (for context):
The cowork session spins up a Linux container for your session. The container disk filled up — likely from previous work (ingesting those Pidilite PDFs is a likely culprit). When you start a "fresh" session it may be reusing the same container rather than getting a new one, hence why even new chats fail.

In the meantime: You're already set up here locally and the server is working — that's the more stable environment for this project anyway.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.1062.0

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_