NgXs: TypeError: Class constructor MyState cannot be invoked without 'new'

Question

I'm integrating NgXs Store into my app. I've created few simple states and trying to select data from them, but when app is launched I get the runtime error:

TypeError: Class constructor MyState cannot be invoked without 'new'
    at ngxs-store.js:2166
    at Array.map (<anonymous>)
    at selectFromAppState (ngxs-store.js:2162)
    at Store.selectSnapshot (ngxs-store.js:2343)
    ...

Answer 1

Finally I figured out that I forgot to supply the state class to NgxsModule.

@NgModule({
    imports: [
        CommonModule,
        NgxsModule.forRoot([
            ...
            MyState // this line was missing, so the store cannot instantiate the state
        ], {
            developmentMode: !environment.production
        })
    ],
    exports: [
        NgxsModule
    ]
})
export class StoreModule {}