# INVALID_MIDDLEWARE_CONFIGURATION

**Kind:** Constant

**Source:** [`packages/core/errors/messages.ts`](https://github.com/nestjs/nest/blob/master/packages/core/errors/messages.ts#L260)

**Part of:** [Core](subsystem-packages-core)

## Definition

```ts
`An invalid middleware configuration has been passed inside the module 'configure()' method.`
```

## Value

```ts
`An invalid middleware configuration has been passed inside the module 'configure()' method.`
```