Tree registration causes exception error

Hello, I am very new to this forum. 

I  have managed to crate a new tree with this code:

public static final Holder<ConfiguredFeature<TreeConfiguration,?>> PINE_TREE = FeatureUtils.register("pine_tree", Feature.TREE, new TreeConfiguration.TreeConfigurationBuilder (BlockStateProvider.simple(BlockManager.PINE_LOG.get()), new StraightTrunkPlacer(5, 6, 3), BlockStateProvider.simple(BlockManager.PINE_LEAVES.get()), new BlobFoliagePlacer(ConstantInt.of(2), ConstantInt.of(0), 4), new TwoLayersFeatureSize(1, 0, 2)).build());

In my placedFeatures class, I've this code:

public static final Holder<PlacedFeature> PINE_CHECKED = PlacementUtils.register("pine_checked", ConfiguredFeaturesManager.PINE_TREE, treePlacement(PlacementUtils.countExtra(10, 0.1F, 1)));

public static final RegistryObject<PlacedFeature> PINE_PLACED = PLACED_FEATURES.register( "pine_placed", () -> new PlacedFeature ((Holder<ConfiguredFeature<?,?>>) (Holder<? extends ConfiguredFeature<?,?>>) ConfiguredFeaturesManager.PINE_TREE, List.of(RarityFilter.onAverageOnceEvery(15), InSquarePlacement.spread(), PlacementUtils. HEIGHTMAP, BiomeFilter.biome())));

And, in my configuredFeatures class, I've this code:

public static final Holder<ConfiguredFeature<RandomFeatureConfiguration, ?>> PINE_SPAWN = FeatureUtils.register("pine_spawn", Feature.RANDOM_SELECTOR, new RandomFeatureConfiguration(List.of(new WeightedPlacedFeature(PINE_CHECKED, 0.2F), new WeightedPlacedFeature(PINE_CHECKED, 0.1F)), PlacedFeaturesManager.PINE_CHECKED));

when I run, it gives this errors:

java.lang.ExceptionInInitializerError
java.lang.NullPointerException: Registry Object not present: udy:rubyore

I have tried to solve this, but don't know how. If someone has an idea that would be great. 

Thank you for the help!

Edited December 8, 20231 yr by MarKis