Error map

WRONGTYPE WRONGTYPE Operation against a key holding the wrong kind of value

Node.js · layer 4, Application & API

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Centre: this error. First ring: errors it is linked with (8). 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 2 · Network 4 · Application & API 6 · Platform & cloud 7 · Build & delivery
WRONGTYPE — WRONGTYPE Operation against a key holding the wrong kind of value (Node.js)WRONGTYPEMODULE_NOT_FOUND — Error: Cannot find module 'x' (MODULE_NOT_FOUND) (Node.js)MODULE_NOT_FOUNDNOAUTH — ReplyError: NOAUTH Authentication required. (Node.js)NOAUTHSyntaxError import — SyntaxError: Cannot use import statement outside a module (Node.js)SyntaxError importlisten EACCES — Error: listen EACCES: permission denied 0.0.0.0:80 (Node.js)listen EACCESError establishing a Redis connection — WordPress: Error establishing a Redis connection (object cache) (WordPress)Error establishing …EADDRINUSE — Error: listen EADDRINUSE: address already in use :::3000 (Node.js)EADDRINUSEDEP0005 — DeprecationWarning: Buffer() is deprecated due to security and usability issues (DEP0005) (Node.js)DEP0005DEP0040 — DeprecationWarning: The `punycode` module is deprecated (DEP0040) (Node.js)DEP0040ERESOLVE — npm ERR! code ERESOLVE — unable to resolve dependency tree (npm)ERESOLVEENOENT — Error: ENOENT: no such file or directory (Node.js)ENOENTTypeError: not a function — TypeError: x is not a function (JavaScript)TypeError: not a fu…AADSTS700016 — Azure AD (Entra ID): AADSTS700016 Application not found in the directory (Azure)AADSTS700016TokenExpiredError — JWT Expired / Invalid Token (Authentication)TokenExpiredErrorinvalid_grant — OAuth 2.0 Error: invalid_grant (Authentication)invalid_grantReferenceError — ReferenceError: x is not defined (JavaScript)ReferenceErrorERR_REQUIRE_ESM — Error [ERR_REQUIRE_ESM]: require() of ES Module not supported (Node.js)ERR_REQUIRE_ESMERR_HTTP_HEADERS_SENT — Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client (Node.js)ERR_HTTP_HEADERS_SE…daemon — Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? (Docker)daemonport is already allocated — Docker: Bind for 0.0.0.0:80 failed: port is already allocated (Docker)port is already all…403 — HTTP 403 Forbidden (HTTP)403DB connection — WordPress: Error Establishing a Database Connection (WordPress)DB connection304 — HTTP 304 Not Modified (HTTP)304412 — HTTP 412 Precondition Failed (HTTP)412ECONNREFUSED — Error: connect ECONNREFUSED 127.0.0.1:5432 (Node.js)ECONNREFUSEDELIFECYCLE — npm ERR! code ELIFECYCLE / Command failed with exit code 1 (npm)ELIFECYCLEPort 8080 in use — Web server failed to start. Port 8080 was already in use. (Java)Port 8080 in useERR_IMPORT_ATTRIBUTE_MISSING — TypeError [ERR_IMPORT_ATTRIBUTE_MISSING]: Module needs an import attribute of "type: json" (Node.js)ERR_IMPORT_ATTRIBUT…Unhandled 'error' event — Error: Unhandled 'error' event (events.js / node:events) (Node.js)Unhandled 'error' e…EBADENGINE — npm WARN EBADENGINE Unsupported engine / The engine "node" is incompatible with this module (Node.js)EBADENGINECould not resolve — Gradle: Could not resolve all files for configuration / Could not resolve dependency (Android)Could not resolveClassNotFoundException — java.lang.ClassNotFoundException / NoClassDefFoundError (Java)ClassNotFoundExcept…CocoaPods compatible versions — CocoaPods could not find compatible versions for pod (iOS)CocoaPods compatibl…

Directly related (8)

MODULE_NOT_FOUNDNode.js

Error: Cannot find module 'x' (MODULE_NOT_FOUND)

Node can’t resolve the module path — the package isn’t installed, or a relative path/extension is wrong.

NOAUTHNode.js

ReplyError: NOAUTH Authentication required.

The Redis server requires a password (or ACL user) but the client didn’t authenticate.

SyntaxError importNode.js

SyntaxError: Cannot use import statement outside a module

An `import` statement ran in a context treated as CommonJS (Node without "type": "module", a browser script without type="module"…

listen EACCESNode.js

Error: listen EACCES: permission denied 0.0.0.0:80

Node isn’t allowed to bind that port — ports below 1024 need root on Linux/macOS, and some Windows ports are reserved.

Error establishing a Redis connectionWordPress

WordPress: Error establishing a Redis connection (object cache)

The persistent object cache drop-in (object-cache.php) can’t connect to Redis, so the whole site fails.

EADDRINUSENode.js

Error: listen EADDRINUSE: address already in use :::3000

Another process is already listening on that port.

DEP0005Node.js

DeprecationWarning: Buffer() is deprecated due to security and usability issues (DEP0005)

Code (yours or a dependency) uses the deprecated new Buffer() constructor.

DEP0040Node.js

DeprecationWarning: The `punycode` module is deprecated (DEP0040)

A dependency imports Node’s built-in punycode module, deprecated since Node 21.

Two steps away (24)

ERESOLVEnpm

npm ERR! code ERESOLVE — unable to resolve dependency tree

npm 7+ found conflicting peer dependency requirements and refuses to install a broken tree.

ENOENTNode.js

Error: ENOENT: no such file or directory

A file or directory the program tried to open doesn’t exist at that path.

TypeError: not a functionJavaScript

TypeError: x is not a function

You called something as a function, but its value is not a function (it’s undefined, a string, an object…).

AADSTS700016Azure

Azure AD (Entra ID): AADSTS700016 Application not found in the directory

The client ID in your sign-in request doesn’t exist in the tenant you’re authenticating against.

TokenExpiredErrorAuthentication

JWT Expired / Invalid Token

The JSON Web Token sent with the request is expired, malformed or signed with a different key, so the API rejects it (usually wit…

invalid_grantAuthentication

OAuth 2.0 Error: invalid_grant

The authorization code, refresh token or credentials sent to the token endpoint are invalid, expired, already used or were issued…

ReferenceErrorJavaScript

ReferenceError: x is not defined

Code refers to a variable or function name that doesn’t exist in the current scope.

ERR_REQUIRE_ESMNode.js

Error [ERR_REQUIRE_ESM]: require() of ES Module not supported

CommonJS code used `require()` on a package that is ES-module-only (node-fetch 3, chalk 5, nanoid 4, got 12…).

ERR_HTTP_HEADERS_SENTNode.js

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

An Express/Node handler tried to send a second response (or set headers) after one was already sent.

daemonDocker

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

The docker CLI can’t talk to the Docker engine — it isn’t running, or your user can’t access the socket.

port is already allocatedDocker

Docker: Bind for 0.0.0.0:80 failed: port is already allocated

Another container or host process already publishes that host port.

403HTTP

HTTP 403 Forbidden

The server understood the request but refuses to authorize it — you (or the server process) are not allowed to access this resour…

DB connectionWordPress

WordPress: Error Establishing a Database Connection

WordPress can’t connect to its MySQL/MariaDB database with the credentials in wp-config.php, or the database server is down.

304HTTP

HTTP 304 Not Modified

The cached copy is still valid, so the server sends no body and the client reuses its cache.

412HTTP

HTTP 412 Precondition Failed

A conditional request header (If-Match, If-Unmodified-Since) didn’t match the current state of the resource.

ECONNREFUSEDNode.js

Error: connect ECONNREFUSED 127.0.0.1:5432

Nothing is listening at that host:port — the target service is down or you’re connecting to the wrong address.

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…

Port 8080 in useJava

Web server failed to start. Port 8080 was already in use.

Spring Boot couldn’t bind its embedded server port because another process uses it.

ERR_IMPORT_ATTRIBUTE_MISSINGNode.js

TypeError [ERR_IMPORT_ATTRIBUTE_MISSING]: Module needs an import attribute of "type: json"

An ES module imported a .json file without the required import attribute.

Unhandled 'error' eventNode.js

Error: Unhandled 'error' event (events.js / node:events)

An EventEmitter (stream, socket, child process, server) emitted 'error' and nothing listened for it, so Node crashed.

EBADENGINENode.js

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.

Could not resolveAndroid

Gradle: Could not resolve all files for configuration / Could not resolve dependency

Gradle couldn’t download a dependency — wrong coordinates/version, missing repository, offline mode, or network/proxy issues.

ClassNotFoundExceptionJava

java.lang.ClassNotFoundException / NoClassDefFoundError

The JVM couldn’t find a class on the classpath at runtime.

CocoaPods compatible versionsiOS

CocoaPods could not find compatible versions for pod

pod install can’t satisfy the version constraints — outdated spec repo, a higher deployment target required, or two pods needing…

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