Cannot import beta in feature module

[olaf89]

What is the expected behavior?

I would like to use Gallery in feature module without importing it in AppModule

What is the current behavior?

In previous version it was possible to import GalleryModule and LightboxModule in feature module and it worked, with latest beta's its not longer possible

The following error is thrown:
TypeError: Cannot read property 'config' of undefined
at new GalleryComponent (ngx-gallery-core.js:694)

What are the steps to reproduce?

Import gallery in feature module

What is the use-case or motivation for changing an existing behavior?

I would like to use gallery in feature module

Which versions are you using for the following packages?

Angular: 7
Angular CDK:7
Angular CLI:7
Typescript:3.16
Gallery: 4.0.0-beta.1

Is there anything else we should know?

[MurhafSousli]

Did you try GalleryModule.forRoot() in your lazy module?

[olaf89]

Yes, thats how i have been importing with success in v3

[MurhafSousli]

fixed in v4.0.0