Error map

MassAssignmentException Laravel: Illuminate\Database\Eloquent\MassAssignmentException: Add [x] to fillable property to allow mass assignment

Laravel · layer 4, Application & API

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Centre: this error. First ring: errors it is linked with (3). 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.

2 · Network 4 · Application & API 6 · Platform & cloud 7 · Build & delivery
MassAssignmentException — Laravel: Illuminate\Database\Eloquent\MassAssignmentException: Add [x] to fillable property to allow mass assignment (Laravel)MassAssignm…Target class does not exist — Laravel: Target class [App\Http\Controllers\X] does not exist. (PHP)Target class does n…Route [login] not defined — Laravel: Symfony\Component\Routing\Exception\RouteNotFoundException: Route [login] not defined (Laravel)Route [login] not d…The GET method is not supported for route — Laravel: The GET method is not supported for route x. Supported methods: POST (MethodNotAllowedHttpException) (Laravel)The GET method is n…Class not found — PHP Fatal error: Uncaught Error: Class "X" not found (PHP)Class not foundNo application encryption key — Laravel: No application encryption key has been specified. (PHP)No application encr…419 Page Expired — Laravel: 419 Page Expired (CSRF token mismatch) (PHP)419 Page Expiredpublickey — Git: Permission denied (publickey). fatal: Could not read from remote repository. (Git)publickeyAADSTS700016 — Azure AD (Entra ID): AADSTS700016 Application not found in the directory (Azure)AADSTS700016401 — HTTP 401 Unauthorized (HTTP)401404 — HTTP 404 Not Found (HTTP)404405 — HTTP 405 Method Not Allowed (HTTP)405Whitelabel Error Page — Whitelabel Error Page — This application has no explicit mapping for /error (Java)Whitelabel Error Pa…

Directly related (3)

Target class does not existPHP

Laravel: Target class [App\Http\Controllers\X] does not exist.

Laravel’s container couldn’t find the controller or class named in a route or binding.

Route [login] not definedLaravel

Laravel: Symfony\Component\Routing\Exception\RouteNotFoundException: Route [login] not defined

Code called route('name') for a route name that doesn’t exist — very often route('login') from the auth middleware in API-only ap…

The GET method is not supported for routeLaravel

Laravel: The GET method is not supported for route x. Supported methods: POST (MethodNotAllowedHttpException)

The URL exists, but not for the HTTP method used — e.g. opening a POST-only route in the browser, or a form sending GET.

Two steps away (9)

Class not foundPHP

PHP Fatal error: Uncaught Error: Class "X" not found

PHP couldn’t load the class — autoloading failed, the namespace is wrong, or the dependency isn’t installed.

No application encryption keyPHP

Laravel: No application encryption key has been specified.

Laravel’s APP_KEY is missing, so it can’t encrypt sessions and cookies.

419 Page ExpiredPHP

Laravel: 419 Page Expired (CSRF token mismatch)

Laravel rejected a POST because the CSRF token was missing, expired or didn’t match the session.

publickeyGit

Git: Permission denied (publickey). fatal: Could not read from remote repository.

SSH authentication to GitHub/GitLab/Bitbucket failed — no key, wrong key, or the key isn’t added to your account.

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.

401HTTP

HTTP 401 Unauthorized

The request has no valid authentication credentials — you need to log in or send a valid token.

404HTTP

HTTP 404 Not Found

The server can’t find anything at the requested URL.

405HTTP

HTTP 405 Method Not Allowed

The URL exists, but it doesn’t accept the HTTP method you used (e.g. POST to a GET-only route).

Whitelabel Error PageJava

Whitelabel Error Page — This application has no explicit mapping for /error

Spring Boot’s default error page — the request hit no controller mapping (404) or a controller threw (500).

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