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# NEURLFilterManager.Error

An enumeration of URL filter error codes

```
enum Error
```

## Topics

### Configuration errors

[`case configurationUnchanged`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationUnchanged)

The filter configuration is unchanged.

[`case configurationInvalid`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationInvalid)

The filter configuration is invalid.

[`case configurationDisabled`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationDisabled)

The filter configuration is disabled.

[`case configurationStale`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationStale)

The system needs to load the filter configuration.

[`case configurationCannotBeRemoved`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationCannotBeRemoved)

The system can’t remove the filter configuration.

[`case configurationPermissionDenied`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationPermissionDenied)

Operation permission denied.

[`case configurationInternalError`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationInternalError)

An internal configuration error occurred.

[`case configurationNotLoaded`](/documentation/NetworkExtension/NEURLFilterManager/Error/configurationNotLoaded)

The configuration hasn’t been loaded.

### Server errors

[`case serverSetupIncomplete`](/documentation/NetworkExtension/NEURLFilterManager/Error/serverSetupIncomplete)

PIR Server or/and OHTTP Private Relay setup incomplete.

### Extension errors

[`case extensionCancelled`](/documentation/NetworkExtension/NEURLFilterManager/Error/extensionCancelled)

The app extension cancelled the feature bring up.

[`case extensionNotFound`](/documentation/NetworkExtension/NEURLFilterManager/Error/extensionNotFound)

The system can’t find the app extension.

[`case extensionFailedToLoad`](/documentation/NetworkExtension/NEURLFilterManager/Error/extensionFailedToLoad)

The app extension failed to load.

### Other errors

[`case internalError`](/documentation/NetworkExtension/NEURLFilterManager/Error/internalError)

An internal error occurred.

[`case unknown`](/documentation/NetworkExtension/NEURLFilterManager/Error/unknown)

The system encountered an unknown error.

## Relationships

### Conforms To

[`Escapable`](/documentation/Swift/Escapable)

[`Error`](/documentation/Swift/Error)

[`LocalizedError`](/documentation/Foundation/LocalizedError)

[`Sendable`](/documentation/Swift/Sendable)

[`Hashable`](/documentation/Swift/Hashable)

[`Copyable`](/documentation/Swift/Copyable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`Equatable`](/documentation/Swift/Equatable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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