Module not found: Error: Cannot resolve module 'MyDatePicker/src/index'

[marxxxx]

When using your component in an Angular 2 Project based on yo generator-aspnetcore-spa (https://www.npmjs.com/package/generator-aspnetcore-spa) i get the following errors:

ERROR in ./ClientApp/app/app.module.ts
(1,30): error TS2307: Cannot find module 'MyDatePicker/src/index'.
ERROR in ./ClientApp/app/app.module.ts
Module not found: Error: Cannot resolve module 'MyDatePicker/src/index' in xxx\ClientApp\app
@ ./ClientApp/app/app.module.ts 8:14-47

Disabling server-side rendering had no effect as well.

Is there anything i was missing?
Thank you for your help!

Kind regards
Markus