Error: register(K) has private access in GameRegistry

I'm trying to make my custom model rotatable. Everything is working, but every time I recompile the mod, it gives me this error saying that "register (K) has private access in GameRegistry. I don't understand why it keeps doing this. Please help!

Error Report:

Executing gradle command: clean build
Microsoft Windows [Version 10.0.16299.431]
(c) 2017 Microsoft Corporation. All rights reserved.
C:\Pylo\MCreator179>cd forge
C:\Pylo\MCreator179\forge>SET "JAVA_HOME=C:\Pylo\MCreator179\jdk\"
C:\Pylo\MCreator179\forge>SET JAVA_EXE=%JAVA_HOME%\bin\java.exe
C:\Pylo\MCreator179\forge>SET PATH=%JAVA_HOME%\bin\;%PATH%
C:\Pylo\MCreator179\forge>SET "GRADLE_USER_HOME=C:\Users\mrans\.mcreator\gradle"
C:\Pylo\MCreator179\forge>gradlew -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" clean build 
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
#################################################
         ForgeGradle 2.3-SNAPSHOT-4a7d623        
  https://github.com/MinecraftForge/ForgeGradle  
#################################################
                 Powered by MCP                  
             http://modcoderpack.com             
     by: Searge, ProfMobius, R4wk, ZeuX          
     Fesh0r, IngisKahn, bspkrs, LexManos         
#################################################
:clean
:deobfCompileDummyTask
:deobfProvidedDummyTask
:sourceApiJava
:compileApiJava UP-TO-DATE
:processApiResources UP-TO-DATE
:apiClasses UP-TO-DATE
:sourceMainJava
C:\Pylo\MCreator179\forge\build\sources\main\java\mod\mcreator\mcreator_bBCSinkEast.java:51: error: register(K) has private access in GameRegistry
      GameRegistry.register(block);
                  ^
  where K is a type-variable:
    K extends IForgeRegistryEntry declared in method register(K)
C:\Pylo\MCreator179\forge\build\sources\main\java\mod\mcreator\mcreator_bBCSinkEast.java:53: error: register(K) has private access in GameRegistry
      GameRegistry.register(new ItemBlock(block).setRegistryName(block.getRegistryName()));
                  ^
  where K is a type-variable:
    K extends IForgeRegistryEntry declared in method register(K)
2 errors
:compileJava FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 25.843 secs
C:\Pylo\MCreator179\forge>
Task completed with return code 0 in 26994 milliseconds

Code:

package mod.mcreator;

import net.minecraftforge.fml.relauncher.SideOnly;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.common.registry.GameRegistry;
import net.minecraftforge.fml.common.event.FMLServerStartingEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;

import net.minecraft.world.World;
import net.minecraft.world.IBlockAccess;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.BlockRenderLayer;
import net.minecraft.item.ItemStack;
import net.minecraft.item.ItemBlock;
import net.minecraft.item.Item;
import net.minecraft.client.renderer.block.model.ModelResourceLocation;
import net.minecraft.client.Minecraft;
import net.minecraft.block.state.IBlockState;
import net.minecraft.block.material.Material;
import net.minecraft.block.SoundType;
import net.minecraft.block.Block;

import java.util.Random;

import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyDirection;
import net.minecraft.block.state.BlockStateContainer;
import net.minecraft.entity.EntityLivingBase;

public class mcreator_bBCSinkEast {

	public mcreator_bBCSinkEast() {
	}

	public static BlockBBCSinkEast block;
	public static Item item;
	public static Object instance;

	public int addFuel(ItemStack fuel) {
		return 0;
	}

	public void serverLoad(FMLServerStartingEvent event) {
	}

	public void preInit(FMLPreInitializationEvent event) {
		block.setRegistryName("bbcsinkeast");
		GameRegistry.register(block);

		GameRegistry.register(new ItemBlock(block).setRegistryName(block.getRegistryName()));
	}

	public void registerRenderers() {
	}

	public void load(FMLInitializationEvent event) {
		if (event.getSide() == Side.CLIENT) {
			Minecraft.getMinecraft().getRenderItem().getItemModelMesher()
					.register(item, 0, new ModelResourceLocation("testenvironmentmod:bbcsinkeast", "inventory"));
		}
	}

	static {
		block = (BlockBBCSinkEast) (new BlockBBCSinkEast().setHardness(2.0F).setResistance(10.0F).setLightLevel(0.0F)
				.setUnlocalizedName("bbcsinkeast").setLightOpacity(0).setCreativeTab(mcreator_east.tab));
		block.setHarvestLevel("pickaxe", 4);
	}

	public void generateSurface(World world, Random random, int chunkX, int chunkZ) {
	}

	public void generateNether(World world, Random random, int chunkX, int chunkZ) {
	}

	static class BlockBBCSinkEast extends Block {

		int a1 = 0, a2 = 0, a3 = 0, a4 = 0, a5 = 0, a6 = 0;
		boolean red = false;
	public static final PropertyDirection FACING = PropertyDirection.create("facing", EnumFacing.Plane.HORIZONTAL);

		protected BlockBBCSinkEast() {
			super(Material.GROUND);
			setSoundType(SoundType.WOOD);
		this.setDefaultState(blockState.getBaseState().withProperty(FACING, EnumFacing.NORTH));
		}

		@Override
		public void onBlockAdded(World world, BlockPos pos, IBlockState state) {
			int i = pos.getX();
			int j = pos.getY();
			int k = pos.getZ();
			world.scheduleUpdate(new BlockPos(i, j, k), this, this.tickRate(world));
		}

		@Override
		public int getWeakPower(IBlockState blockState, IBlockAccess blockAccess, BlockPos pos, EnumFacing side) {
			return red ? 15 : 0;
		}

		@Override
		public int getStrongPower(IBlockState blockState, IBlockAccess blockAccess, BlockPos pos, EnumFacing side) {
			return red ? 15 : 0;
		}

		@Override
		public boolean isOpaqueCube(IBlockState state) {
			return false;
		}

		@SideOnly(Side.CLIENT)
		@Override
		public BlockRenderLayer getBlockLayer() {
			return BlockRenderLayer.SOLID;
		}

		@Override
		public AxisAlignedBB getBoundingBox(IBlockState state, IBlockAccess source, BlockPos pos) {
			return new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 1.0D, 1.0D);
		}

		@Override
		public int tickRate(World world) {
			return 10;
		}

		@Override
          public int quantityDropped(Random par1Random) {
               return 1;
          }
          
          @Override
          public IBlockState getStateFromMeta(int meta) {
               EnumFacing facing = EnumFacing.getFront(meta);
 
          if(facing.getAxis()==EnumFacing.Axis.Y) {
               facing=EnumFacing.NORTH;
          }
 
          return getDefaultState().withProperty(FACING, facing);
          }
 
          @Override
          public int getMetaFromState(IBlockState state) {
          return ((EnumFacing) state.getValue(FACING)).getIndex();
          }
 
          @Override
          protected BlockStateContainer createBlockState() {
          return new BlockStateContainer(this, new IProperty[]{FACING});
          }
 
          @Override
          public IBlockState getStateForPlacement(World worldIn, BlockPos pos,
               EnumFacing facing, float hitX, float hitY, float hitZ, int meta,
               EntityLivingBase placer) {
                    return getDefaultState().withProperty(FACING, placer.getHorizontalFacing().getOpposite());
               }
 
    }
}