Fix Claude Code Invalid Version Crash on Startup

What this error means

Claude Code Invalid Version crash means Claude Code is failing during startup while parsing a version value. Based on the imported issue evidence, this is not a prompt, model, or API-key failure. It is more likely a local CLI/version metadata problem.

Why this happens

The imported reports describe Claude Code startup failures where a version-like value cannot be parsed as a normal semantic version. That can happen when a cached value, update artifact, or local executable reports extra text that the startup code does not expect.

Common causes

• Claude Code reads stale or malformed local version metadata.
• The shell is running a different claude executable than the one just installed.
• A package manager, WSL environment, or terminal session still points at an older binary.
• The tool crashes before it can refresh its local state.

Quick fixes

1. Capture the exact startup error before deleting anything.
2. Check which executable your shell runs:

command -v claude

3. Restart the terminal or shell where Claude Code is launched.
4. Reinstall or update Claude Code using the same installation method originally used.
5. Clear only Claude Code-specific cache/config if the upstream issue or tool docs identify a safe cache path.

Copy-paste commands

Check the executable path

command -v claude

Check whether multiple Claude commands are visible

type -a claude

Capture the startup error

claude --version

If claude --version crashes with the same invalid-version message, focus on install/update state before debugging API credentials.

Platform/tool-specific checks

macOS and Linux

• Run type -a claude to check whether multiple installs are on PATH.
• Restart the terminal after reinstalling so shell command hashing does not keep using an old executable.

WSL

• Confirm whether Claude Code was installed inside WSL or on Windows. Mixed paths can leave WSL running a stale command.

Step-by-step troubleshooting

1. Confirm the crash happens immediately at startup or when checking the version.
2. Record the executable path with command -v claude.
3. Compare that path with the installation method you use.
4. Reinstall or update Claude Code with the same package manager or installer.
5. Open a new shell and retry claude --version.
6. If the same invalid-version crash remains, check the linked upstream issues before removing any local config.

How to prevent it

• Keep one Claude Code installation method per machine.
• Avoid mixing host OS and WSL installs in the same shell workflow.
• Document the install/update method used by your team.

Sources checked

• https://github.com/anthropics/claude-code/issues/16699
• https://github.com/anthropics/claude-code/issues/16696
• https://github.com/anthropics/claude-code/issues/16682

Evidence note: Multiple public issue reports describe Claude Code startup crashes involving invalid version parsing.

Related errors

• Claude Code installation failed
• Claude Code update error
• Claude Code rate limit reached

FAQ

Is this an Anthropic API key problem?

Usually no. A startup invalid-version crash happens before normal API request troubleshooting matters.

Should I delete all Claude Code config?

Not as a first step. Check the executable path and reinstall/update path first. Delete only tool-specific cache or config that the upstream issue or official docs identify as safe.

Why does restarting the shell help?

Some shells cache command locations. A new shell can stop using an old executable after an update or reinstall.

How do I know the fix worked?

claude --version or Claude Code startup should complete without the invalid-version crash.