Error map

missing ) SyntaxError: missing ) after argument list

JavaScript · layer 1, On your device

Centre: this error. First ring: errors it is linked with (10). 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.

1 · On your device 4 · Application & API 6 · Platform & cloud 7 · Build & delivery

Directly related (10)

SyntaxErrorPython

SyntaxError: invalid syntax

Python couldn’t parse the code. The caret (^) points at or just after the mistake.

unknown instructionDocker

Dockerfile parse error line N: unknown instruction

A line in the Dockerfile doesn’t start with a valid instruction — usually a broken line continuation or a typo.

unexpected end of inputJavaScript

SyntaxError: Unexpected end of input

The parser reached the end of the code (or JSON) while still expecting more — a missing } ) ] or empty JSON.

invalid regexJavaScript

SyntaxError: Invalid regular expression: /x/: Unterminated group

A regex pattern has invalid syntax — unbalanced parentheses/brackets or unescaped special characters.

Unexpected token <JavaScript

SyntaxError: Unexpected token '<' (HTML served instead of JavaScript)

The browser loaded a .js file but received HTML (an error page or the SPA index.html).

await outside asyncJavaScript

SyntaxError: await is only valid in async functions and the top level bodies of modules

await was used inside a function that isn’t async (or in a classic, non-module script).

unexpected identifierJavaScript

SyntaxError: Unexpected identifier

The parser found a name where it expected punctuation — usually a missing comma, operator or quote.

invalid tokenJavaScript

SyntaxError: Invalid or unexpected token

The code contains a character the parser can’t handle — smart quotes, stray characters or an unterminated string.

GraphQL Syntax ErrorAPI

GraphQL: Syntax Error: Expected Name, found <EOF> / Unexpected }

The GraphQL document is malformed — unbalanced braces, a stray comma/character, or an empty query.

already declaredJavaScript

SyntaxError: Identifier 'x' has already been declared

The same let/const/class name was declared twice in the same scope.

Two steps away (21)

Parse errorPHP

PHP Parse error: syntax error, unexpected …

PHP can’t parse the file because of a syntax mistake — the real error is often on the line before the one reported.

IndentationErrorPython

IndentationError: unexpected indent / expected an indented block

Python’s block structure is broken — inconsistent indentation or mixed tabs and spaces.

ELIFECYCLEnpm

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…

gyp ERR!npm

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.

COPY failedDocker

COPY failed: file not found in build context / "/app/x": not found

The Dockerfile COPY refers to a path outside the build context, excluded by .dockerignore, or relative to the wrong directory.

SyntaxError: JSONJavaScript

SyntaxError: Unexpected token < in JSON at position 0

`JSON.parse()` / `response.json()` received something that isn’t JSON — very often an HTML error page.

MismatchedInputExceptionJava

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).

UnrecognizedPropertyExceptionJava

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.

Adjacent JSX elementsReact

Adjacent JSX elements must be wrapped in an enclosing tag. Did you want a JSX fragment <>...</>?

A component returns two sibling JSX elements without a single parent.

MIME type not executableJavaScript

Refused to execute script from 'x' because its MIME type ('text/html') is not executable

The browser fetched a script but the server labelled it text/html (usually an error page), so it refused to run it.

ChunkLoadErrorJavaScript

ChunkLoadError: Loading chunk 123 failed.

A lazily loaded JavaScript chunk couldn’t be downloaded — usually because a new deployment removed the old hashed files.

module MIME typeJavaScript

Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/html"

A or dynamic import got HTML back instead of JavaScript.

UnhandledPromiseRejectionNode.js

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.

AbortErrorJavaScript