NullInjectorError: No provider for ReducerManager

Managed to solve this by adding StoreModule.forRoot({}), in the imports.

StoreModule.forRoot should only be called once in the root of your project NgModule. If you wan't to register a feature, use StoreModule.forFeature. Using forRoot registers the global providers needed for Store.

Check the github discussion here on this issue. The above reason was stated in the same discussion

I had the same problem and I found this solution

imports: [
       StoreModule.forRoot({}), 
    StoreModule.forFeature('filter-app', filterReducer)
]