Angular: MaxListenersExceededWarning

Hi

I get the following Error while starting.

```(node:20640) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [Server].

Use emitter.setMaxListeners() to increase limit
(Use node --trace-warnings ... to show where the warning was created)```

What can I do?

Thanks for any help