Error map
Missing script npm ERR! Missing script: "start"
npm · layer 7, Build & delivery
Centre: this error. First ring: errors it is linked with (7). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (7)
npm ERR! code EJSONPARSE — Failed to parse json / Unexpected token in JSON at position
package.json (or package-lock.json) contains invalid JSON.
npm ERR! code ELIFECYCLE / Command failed with exit code 1
An npm script (build, start, test, postinstall) exited with an error. ELIFECYCLE is only the wrapper — the real error is printed…
Error: Cannot find matching keyid (Corepack signature verification)
An older Corepack couldn’t verify the signature of a newly published pnpm/yarn release after npm rotated its signing keys.
npm ERR! code EOVERRIDE — Override for x conflicts with direct dependency
An "overrides" entry sets a different version for a package you also depend on directly.
sh: vite: command not found (npm script)
A tool used in an npm script isn’t installed in node_modules/.bin.
npm ERR! cb() never called!
An old npm crash during install — usually network/cache corruption.
npm ERR! Invalid Version: (semver parse error)
A package.json or lockfile contains a version string that isn’t valid semver.
Two steps away (21)
SyntaxError: Unexpected token < in JSON at position 0
`JSON.parse()` / `response.json()` received something that isn’t JSON — very often an HTML error page.
com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type `java.util.ArrayList` from Object value
Jackson found JSON whose shape doesn’t match the target Java type (object vs array, string vs number, missing constructor).
com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "x", not marked as ignorable
The JSON contains a field your Java class doesn’t have, and Jackson is configured to fail on unknown properties.
Error: listen EADDRINUSE: address already in use :::3000
Another process is already listening on that port.
Kubernetes: OOMKilled (exit code 137)
The container used more memory than its limit, and the kernel killed it.
gyp ERR! build error / node-gyp rebuild failed
A dependency with native C/C++ code couldn’t compile — missing build tools, Python, or an unsupported Node version.
Authentication plugin 'caching_sha2_password' cannot be loaded
An old MySQL client/driver can’t use MySQL 8’s default authentication plugin.
npm ERR! 403 — You cannot publish over the previously published versions: 1.2.3
That version number has already been published (or unpublished) and can’t be reused.
npm ERR! could not determine executable to run
npx couldn’t find a binary to run for that package.
npm ERR! code ERESOLVE — unable to resolve dependency tree
npm 7+ found conflicting peer dependency requirements and refuses to install a broken tree.
npm ERR! code E404 — 404 Not Found: package@version is not in this registry
npm asked the registry for a package (or version) that doesn’t exist there — a typo, a private/scoped package without auth, or th…
npm ERR! code ETARGET — No matching version found for package@^9.9.9
The version range in package.json doesn’t match any published version of the package.
bash: command not found
The shell can’t find an executable with that name in any directory on your PATH.
npm ERR! code EBADPLATFORM — notsup Unsupported platform for fsevents: wanted {"os":"darwin"} (current: {"os":"linux"})
A package restricted to certain OS/CPU was installed as a required (not optional) dependency on another platform.
npm ERR! code ELSPROBLEMS — invalid / extraneous / missing packages in npm ls
npm ls found the installed tree doesn’t match package.json and the lockfile.
npm ERR! code EINTEGRITY — sha512 integrity checksum failed
A downloaded package’s hash doesn’t match the integrity value in package-lock.json — a corrupted cache, a changed tarball, or a l…
npm WARN old lockfile — The package-lock.json file was created with an old version of npm, so supplemental metadata must be fetched
The lockfile is lockfileVersion 1 (npm 6) and npm 7+ is upgrading it.
Error: ENOSPC: System limit for number of file watchers reached
Linux ran out of inotify watches — dev servers watching large projects hit the limit.
npm ERR! `npm ci` can only install packages when your package.json and package-lock.json are in sync
package-lock.json doesn’t match package.json, so npm ci refuses to install.
npm ERR! The `npm ci` command can only install with an existing package-lock.json or npm-shrinkwrap.json
npm ci needs a committed lockfile and didn’t find one.
Error: Cannot find module @rollup/rollup-linux-x64-gnu. npm has a bug related to optional dependencies
Rollup’s (and Vite’s) platform-specific optional dependency wasn’t installed — an npm optional-dependency bug with lockfiles from…
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