getgrav/grav · error · InvalidArgumentException

The middleware is not a valid %s and is not passed in the Co

Error message

The middleware is not a valid %s and is not passed in the Container

What it means

Error "The middleware is not a valid %s and is not passed in the Container" thrown in getgrav/grav.

Source

Thrown at system/src/Grav/Framework/RequestHandler/Traits/RequestHandlerTrait.php:54

    /**
     * {@inheritdoc}
     * @throws InvalidArgumentException
     */
    public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $middleware = array_shift($this->middleware);

        // Use default callable if there is no middleware.
        if ($middleware === null) {
            return call_user_func($this->handler, $request);
        }

        if ($middleware instanceof MiddlewareInterface) {
            return $middleware->process($request, clone $this);
        }

        if (null === $this->container || !$this->container->has($middleware)) {
            throw new InvalidArgumentException(
                sprintf('The middleware is not a valid %s and is not passed in the Container', MiddlewareInterface::class),
                $middleware
            );
        }

        array_unshift($this->middleware, $this->container->get($middleware));

        return $this->handle($request);
    }
}

View on GitHub (pinned to 6040efed04)

When it happens

Trigger: Thrown at system/src/Grav/Framework/RequestHandler/Traits/RequestHandlerTrait.php:54 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of getgrav/grav@6040efed04 (2026-08-17). Data as JSON: /api/errors/1870479edbf0e152. Report an issue: GitHub.