Why do my Input Actions not translate to my charactor actor movement code?

Thank you for your response. The input mapping context is being mapped in the SetupPlayerInputComponent function:

// Add Input Mapping Context
	if (APlayerController* PlayerController = Cast<APlayerController>(GetController()))
	{
		if (UEnhancedInputLocalPlayerSubsystem* Subsystem = ULocalPlayer::GetSubsystem<UEnhancedInputLocalPlayerSubsystem>(PlayerController->GetLocalPlayer()))
		{
			Subsystem->AddMappingContext(DefaultMappingContext, 0);
			UE_LOG(LogTemp, Warning, TEXT("Mapping Context added: %s"), *DefaultMappingContext->GetName());
		}
		else
		{
			UE_LOG(LogTemp, Error, TEXT("Failed to add Mapping Context for %s"), *GetName());
		}
	}

This is how it was done in a freshly created 5.4 ThirdPerson C++ Template project (minus the LOG messages, which I added for debugging purposes).