Can circular dependencies cause the 'NullInjectorError: No provider for ReducerManager' error, and if so, how can I address it?

Yes, circular dependencies can lead to this error. If `ReducerManager` depends on a service that, in turn, depends on something within the `ReducerManager`'s module or a dependent module, it can cause problems. Break the circular dependency by using interfaces, abstract classes, or refactoring to avoid the circular reference. Consider providing the dependency further up the module tree.