Missing required @injectable annotation error

[manoj30075]

I'm building a Jupyterlab extension, it uses webpack to to create build. My code is in TypeScript. This extension runs in a browser. Below is the shortened code that I have to inject the dependencies.

`
import { inject, injectable } from 'inversify';

@Injectable()
export class LocalTelemetry implements TelemetryService {
constructor(
@Inject(NAMES.customerId)
private customerId: string = '',
@Inject(NAMES.outputChannelTelemetry)
private OutputChannel: Logger
) {}
`

In the browser console I'm getting this error.
Error: Missing required @injectable annotation in: LocalTelemetry. at getTargets (reflection_utils.js:25:1) at getDependencies (reflection_utils.js:18:1) at planner.js:101:47 at Array.forEach (<anonymous>) at _createSubRequests (planner.js:89:1) at plan (planner.js:131:1) at container.js:604:31 at Container._get (container.js:574:1) at Container._getButThrowIfAsync (container.js:577:1) at Container.get (container.js:352:1)

What am I doing wrong here? I'm not able to find the solution for this. Thanks for help in advance.