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)
]