Unable to summon entity

Minecraft version:1.16.5

Forge version:32.6.34

MCP mapping version:20201028-1.16.3-snapshot

I tried to add an entity to my game,compile is succsseful,but when i enter "/summon touhoucraft:power_point ~ ~ ~" It returned "Unable to summon entity"

this is the entity code and model& render code

package com.lucaiyu.touhoucraft.entities;

import net.minecraft.entity.EntityType;
import net.minecraft.entity.MobEntity;
import net.minecraft.world.World;


public class PowerPoint extends MobEntity {
    public PowerPoint(World worldIn){
        this(null, worldIn);
    }
    public PowerPoint(EntityType<? extends MobEntity> type, World worldIn) {
        super(type, worldIn);
    }
}

package com.lucaiyu.touhoucraft.entities.model;

import com.mojang.blaze3d.matrix.MatrixStack;
import com.mojang.blaze3d.vertex.IVertexBuilder;
import net.minecraft.client.renderer.entity.model.EntityModel;
import net.minecraft.client.renderer.model.ModelRenderer;
import com.lucaiyu.touhoucraft.entities.PowerPoint;

public class PowerPointModel extends EntityModel<PowerPoint> {
	private final ModelRenderer bb_main;

	public PowerPointModel() {
		textureWidth = 64;
		textureHeight = 64;

		bb_main = new ModelRenderer(this);
		bb_main.setRotationPoint(0.0F, 24.0F, 0.0F);
		bb_main.setTextureOffset(0, 0).addBox(-5.0F, -0.5F, -5.0F, 10.0F, 1.0F, 10.0F, 0.0F, false);
	}

	@Override
	public void setRotationAngles(PowerPoint entity, float limbSwing, float limbSwingAmount, float ageInTicks, float netHeadYaw, float headPitch){
	}

	@Override
	public void render(MatrixStack matrixStack, IVertexBuilder buffer, int packedLight, int packedOverlay, float red, float green, float blue, float alpha){
		bb_main.render(matrixStack, buffer, packedLight, packedOverlay, red, green, blue, alpha);
	}

	public void setRotationAngle(ModelRenderer modelRenderer, float x, float y, float z) {
		modelRenderer.rotateAngleX = x;
		modelRenderer.rotateAngleY = y;
		modelRenderer.rotateAngleZ = z;
	}
}

package com.lucaiyu.touhoucraft.entities.render;

import com.lucaiyu.touhoucraft.TouHouCraft;
import com.lucaiyu.touhoucraft.entities.PowerPoint;
import com.lucaiyu.touhoucraft.entities.model.PowerPointModel;
import net.minecraft.client.renderer.entity.EntityRendererManager;
import net.minecraft.client.renderer.entity.MobRenderer;
import net.minecraft.util.ResourceLocation;

public class PowerPointRender extends MobRenderer<PowerPoint, PowerPointModel> {
    private static final ResourceLocation POWER_POINT_TEXTURE = new ResourceLocation(TouHouCraft.MOD_ID, "texture/entity/power_point.png");
    public PowerPointRender(EntityRendererManager renderManagerIn) {
        super(renderManagerIn, new PowerPointModel(), 0.8F);
    }
    public PowerPointRender(EntityRendererManager renderManagerIn, PowerPointModel entityModelIn, float shadowSizeIn) {
        super(renderManagerIn, entityModelIn, shadowSizeIn);
    }

    @Override
    public ResourceLocation getEntityTexture(PowerPoint entity) {
        return POWER_POINT_TEXTURE;
    }
}

This is the registry and client event

package com.lucaiyu.touhoucraft.entities;

import com.lucaiyu.touhoucraft.TouHouCraft;
import net.minecraft.entity.EntityClassification;
import net.minecraft.entity.EntityType;
import net.minecraftforge.fml.RegistryObject;
import net.minecraftforge.registries.DeferredRegister;
import net.minecraftforge.registries.ForgeRegistries;

public class EntityRegistry {
    public static final DeferredRegister<EntityType<?>> ENTITIES = DeferredRegister.create(ForgeRegistries.ENTITIES, TouHouCraft.MOD_ID);

    public static RegistryObject<EntityType<PowerPoint>> power_point =
            ENTITIES.register("power_point",
                    ()->EntityType.Builder.<PowerPoint>create(PowerPoint::new, EntityClassification.MISC)
                            .size(1.0F, 1.0F).build("power_point"));
}

package com.lucaiyu.touhoucraft.events;

import com.lucaiyu.touhoucraft.entities.EntityRegistry;
import com.lucaiyu.touhoucraft.entities.render.PowerPointRender;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.entity.EntityRendererManager;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;

@Mod.EventBusSubscriber(bus = Mod.EventBusSubscriber.Bus.MOD, value = Dist.CLIENT)
public class ClientEvent {
    @SubscribeEvent
    public static void onClientSetupEvent(FMLClientSetupEvent event){
        event.enqueueWork(()->{
            Minecraft mc = Minecraft.getInstance();
            EntityRendererManager manager = mc.getRenderManager();
            manager.register(EntityRegistry.power_point.get(), new PowerPointRender(manager));
        });
    }
}

And this is the main class

package com.lucaiyu.touhoucraft;

import com.lucaiyu.touhoucraft.blocks.BlockRegistry;
import com.lucaiyu.touhoucraft.entities.EntityRegistry;
import com.lucaiyu.touhoucraft.items.ItemRegistry;

import com.lucaiyu.touhoucraft.world.gen.OreGeneration;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.eventbus.api.EventPriority;
import net.minecraftforge.fml.common.Mod;

import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;


@Mod("touhoucraft")
public class TouHouCraft{
    public static String MOD_ID = "touhoucraft";
    public TouHouCraft() {
        ItemRegistry.ITEMS.register(FMLJavaModLoadingContext.get().getModEventBus());
        BlockRegistry.BLOCKS.register(FMLJavaModLoadingContext.get().getModEventBus());
        MinecraftForge.EVENT_BUS.addListener(EventPriority.HIGH, OreGeneration::generateOres);
        EntityRegistry.ENTITIES.register(FMLJavaModLoadingContext.get().getModEventBus());
    }


}