OpenClaw refuses to start with an error like: 'engine node: wanted >=18.0.0, got 16.x.x' or a similar version mismatch. In most cases, the underlying issue is openClaw requires a newer Node.js runtime than the system package manager installed by default.
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High priorityTested by MilanVerified fix
Node.js Version Error on Start
If you are seeing this exact OpenClaw issue, the fastest path is to confirm the likely cause, then work the recovery steps in order without skipping the full restart and retest sequence.
MilanLast updated Mar 8, 2026Verified recovery sequence documented in this repo
Likely Cause
OpenClaw requires a newer Node.js runtime than the system package manager installed by default.
Tags
InstallNode.js
Recovery Steps
- 1Run node --version to confirm your current runtime.
- 2Install nvm from the official install script.
- 3Run nvm install 20 && nvm use 20.
- 4Set your shell profile to use the right version automatically.
- 5Retry openclaw start after reopening the terminal.
Related OpenClaw resources
Adjacent issue guides
Issue FAQ
These answers are written to be self-contained, so you can confirm the likely problem before you start changing your setup.
Work through the recovery steps in order and fully restart OpenClaw before retesting. Skipping the restart or leaving stale auth/config state in place usually causes the issue to return.
Move to the related guide or service link below so you can rule out adjacent configuration problems instead of repeating the same failed steps.
Still blocked?
If the steps above do not clear it, review the full fixes index or book direct troubleshooting help.