Error map
Could not find the builder's node package Angular CLI: Could not find the '@angular-devkit/build-angular:browser' builder's node package / Cannot find module '@angular-devkit/build-angular/package.json'
Angular · layer 1, On your device
Centre: this error. First ring: errors it is linked with (12). 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 (12)
Angular CLI: Node.js version v16.20.2 detected. The Angular CLI requires a minimum Node.js version of v18.19.1
Your Node.js is older (or newer, unsupported) than the Angular CLI version needs.
npm ERR! enoent ENOENT: no such file or directory, open '/path/package.json'
npm ran in a directory without a package.json.
Angular tests: Disconnected, because no message in 30000 ms. / ERROR [launcher]: Cannot start ChromeHeadless
`ng test` could not start or keep the browser Karma uses — Chrome is missing, runs as root in a container, or the test run hung.
Angular CLI: Repository is not clean. Please commit or stash any changes before updating.
`ng update` refuses to run because git has uncommitted changes; it wants every migration to be a reviewable diff.
Angular: NG04014: Invalid configuration of route 'x': one of the following must be provided: component, loadComponent, redirectTo, children or loadChildren
A route object has a path but nothing for the router to render or load.
Angular CLI: Schema validation failed with the following errors: Data path "" must NOT have additional properties(xyz)
`angular.json` (or an option you passed to a builder) contains a property the schema does not allow — a typo, an option removed i…
Angular CLI: zsh: command not found: ng / 'ng' is not recognized as an internal or external command
The Angular CLI is not installed globally or its folder is not on your PATH.
Angular (Sass): Error: Can't find stylesheet to import. @import 'variables';
A Sass `@import` / `@use` cannot resolve its path — wrong relative path, missing underscore partial, or the include path is not c…
Angular: NG0950: Input is required but no value is available yet (input.required / viewChild.required)
A required signal input or query was read before Angular set it — in the constructor or too early in the lifecycle.
Angular: NG0300: Multiple components match node with tagname app-x: A and B
Two components in scope share the same selector, so Angular cannot decide which one renders for that tag.
RxJS: EmptyError: no elements in sequence (firstValueFrom / lastValueFrom on an empty Observable)
`firstValueFrom`, `lastValueFrom`, `first()` or `last()` waited for a value but the Observable completed without emitting.
Angular build: Error: bundle initial exceeded maximum budget. Budget 1.00 MB was not met by 120.00 kB with a total of 1.12 MB
The production build is larger than the size limits (budgets) in angular.json, and the build is configured to fail.
Two steps away (29)
npm WARN EBADENGINE Unsupported engine / The engine "node" is incompatible with this module
A package requires a different Node.js version than the one you’re running.
Angular CLI: Port 4200 is already in use. Use '--port' to specify a different port
Another process is already listening on the dev-server port, often an earlier `ng serve` that was not stopped.
Angular: npm ERR! ERESOLVE could not resolve — Conflicting peer dependency: @angular/core@"^16.0.0" (after ng update / ng add)
A package in your project requires an older Angular version than the one you are installing, so npm refuses the upgrade.
fatal: not a git repository (or any of the parent directories): .git
You ran a Git command outside a Git working tree.
Error: ENOENT: no such file or directory
A file or directory the program tried to open doesn’t exist at that path.
error: pathspec 'x' did not match any file(s) known to git
Git couldn’t find the file or branch name you referenced.
Angular: Error: Cannot find control with name: 'email' (reactive forms)
A `formControlName` points at a control that does not exist in the bound `FormGroup`.
Angular: NullInjectorError: No provider for ActivatedRoute! (also Router) — usually a unit test
A component injects `ActivatedRoute` or `Router`, but no router providers exist in the injector — typical in unit tests or when t…
Angular tests: Component 'X' is not resolved: templateUrl: ./x.component.html — Did you run and wait for 'resolveComponentResources()'?
A test created a component whose external template was not compiled yet — `compileComponents()` was not called/awaited, or the te…
Angular: NG04002: Cannot match any routes. URL Segment: 'x'
The router found no route for the URL you navigated to — missing route, wrong path, or an unloaded lazy route.
Angular (production): Cannot GET /dashboard — 404 when refreshing or opening a deep link
The web server only knows `index.html`; a direct request to `/dashboard` is not a file, so it returns 404 instead of letting Angu…
Angular: NG0200: Circular dependency in DI detected for X
Two or more services inject each other (directly or through a chain), so Angular cannot create any of them first.
Angular: NG0201: No provider for X found in NodeInjector
A component or directive asked for a service no injector in its tree provides.
Angular: NG0203: inject() must be called from an injection context such as a constructor, a factory function, a field initializer or a function used with runInInjectionContext
`inject()` was called somewhere Angular is not constructing a class — for example inside a method, a callback or after an `await`.
bash: command not found
The shell can’t find an executable with that name in any directory on your PATH.
Angular: Error: The Angular Compiler requires TypeScript >=5.4.0 and <5.6.0 but 5.7.2 was found instead
The installed TypeScript version is outside the range your Angular version supports.
[vite] Internal server error: Failed to resolve import "x" from "src/App.jsx". Does the file exist?
Vite couldn’t find an imported file or package.
Module parse failed: Unexpected token. You may need an appropriate loader to handle this file type
Webpack found syntax it can’t parse because no loader is configured for that file (JSX, TypeScript, CSS, or modern syntax in node…
Angular: NG0912: Component ID generation collision detected. Components 'A' and 'B' with selector 'app-x' use the same ID
Angular generated the same internal id for two different components — usually two components with the same selector, template and…
Angular: NG0600: Writing to signals is not allowed in a computed or an effect by default
A `computed()` (or, by default, an `effect()`) tried to call `.set()` or `.update()` on a signal — that creates hidden update loo…
Angular: TypeError: Cannot read properties of undefined (reading 'nativeElement') — @ViewChild used in ngOnInit
A `@ViewChild` / `viewChild()` reference is `undefined` because the view is not created yet, or the element sits inside `@if` / `…
Angular: NG8001: 'app-item' is not a known element — verify that it is included in the component's imports
The template uses a tag Angular does not recognise as a component — it was never imported (standalone) or declared/exported (NgMo…
Angular: NG6008: Component X is standalone, and cannot be declared in an NgModule. Did you mean to import it instead?
A standalone component, directive or pipe was listed in an NgModule's `declarations` array.
Node.js: [UnhandledPromiseRejection] — This error originated either by throwing inside of an async function without a catch block
A promise rejected and nothing handled it; since Node 15 this crashes the process.
Angular: NG02100: InvalidPipeArgument: '[object Object]' for pipe 'AsyncPipe'
The `async` pipe received a plain object or array instead of an Observable or Promise.
RxJS: TypeError: You provided 'undefined' where a stream was expected. You can provide an Observable, Promise, ReadableStream, Array, AsyncIterable, or Iterable.
An RxJS operator (`switchMap`, `mergeMap`, `forkJoin`, `subscribe`) received `undefined` — a function forgot to `return` an Obser…
ChunkLoadError: Loading chunk 123 failed.
A lazily loaded JavaScript chunk couldn’t be downloaded — usually because a new deployment removed the old hashed files.
Angular SSR: NG0500: During hydration Angular expected <div> but found <span> (NG0501, NG0502)
The HTML rendered on the server does not match what the browser's Angular app tried to render, so hydration failed and the page w…
Angular: NG0955: The provided track expression resulted in duplicated keys for a given collection (@for)
In an `@for` block (or `trackBy`), two items produced the same tracking key, so Angular cannot match them to DOM nodes reliably.
Map another error
Popular: 500403400ORA-009331064Critical errorFileNotFoundException assemblyTypeError