Can't access to base clase components from editor

In your AIndieCharacter class declaration, you haven’t included the API declaration, this may be your issue. Without that UE4 can add those members to the class, but can’t reference their internal properties from that context.

See what hapens if you change:

class AIndieCharacter : public ACharacter

to:

class INDIE_API AIndieCharacter : public ACharacter