Claude Code Troubleshooting
Every tool misbehaves now and then. Claude Code problems usually fall into a few familiar groups: installation, sign-in, slow or confused responses, and connection trouble. A calm, step-by-step approach solves most of them in minutes.
The Doctor Visit Idea
A doctor checks the simplest causes first and runs special tests later. Troubleshooting follows the same order. Confirm the basics, read the message on screen, and escalate only when simple checks fail.
1. Read the error message
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2. Check version and sign-in
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3. Run the built-in doctor
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4. Reset the session or context
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5. Check official docs or support
Your First Two Tools
claude --versionprints the installed version. Old versions miss fixes and features./doctorinspects your installation and reports configuration problems.
Symptom Guide
| Symptom | Likely Cause | Fix |
|---|---|---|
| "claude: command not found" | The install folder is missing from the PATH list | Reopen the terminal and follow the installer's PATH instructions |
| Sign-in prompt keeps returning | Expired or missing login | Run /login and complete the browser step |
| Replies feel slow | A very long conversation | Run /compact, or /clear for a new task |
| Claude Code ignores earlier details | Context window nearly full | Run /compact and restate key facts |
| Wrong files edited | Session started in the wrong folder | Exit, cd into the project, relaunch |
| Edits went in a bad direction | Unclear prompt | Rewind with Esc twice and prompt with more detail |
| Constant approval prompts | Strict default rules | Add allow rules for safe commands |
| MCP server will not connect | Wrong address or missing sign-in | Open /mcp and review the status message |
Understanding Context Problems
Many odd behaviors trace back to a crowded context window. Claude Code forgets details, repeats itself, or loses track of the task when old messages fill its memory. Run /context to inspect usage. Compact the session, or start fresh and paste a short summary of the goal.
Network and Proxy Trouble
Company networks sometimes block outside connections. Error messages that mention timeouts or certificates point to this group. Ask your IT team about proxy settings and allowed addresses. Home networks seldom cause the issue, though a VPN occasionally interferes.
Hooks and Settings Problems
- Check that settings files contain valid JSON. A single missing comma blocks the file.
- Run
/hooksto confirm which hooks loaded. - Test each hook script by hand in the terminal.
- Move a suspicious file aside temporarily to see whether the problem disappears.
Debug Mode
Launching with claude --debug prints extra detail about what happens behind the scenes. The output helps support teams and documentation searches. Remove private information before you share the text with anyone.
Writing a Good Problem Report
- State your operating system and Claude Code version.
- Describe the exact action you took.
- Copy the full error text.
- List the fixes you already tried.
A report with these four items gets faster, more accurate help from forums and support channels.
Preventing Future Trouble
- Update Claude Code on a regular schedule.
- Commit work to git before large tasks.
- Keep CLAUDE.md short and accurate.
- Clear the context between unrelated tasks.
Key Points
- Start with the error message, the version number, and /doctor.
- Most slow or forgetful behavior comes from a crowded context.
- Rewind fixes bad edits quickly.
- Invalid JSON and wrong server addresses cause many configuration issues.
- A detailed problem report speeds up outside help.