Normal location exception

I've got an error:

[16:01:19] [Client thread/ERROR] [FML]: Exception loading model for variant tvdtm:happy_ball#inventory for item "tvdtm:happy_ball", normal location exception: 
net.minecraftforge.client.model.ModelLoaderRegistry$LoaderException: Exception loading model tvdtm:item/happy_ball with loader VanillaLoader.INSTANCE, skipping
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:161) ~[ModelLoaderRegistry.class:?]
    at net.minecraftforge.client.model.ModelLoader.loadItemModels(ModelLoader.java:302) ~[ModelLoader.class:?]
    at net.minecraft.client.renderer.block.model.ModelBakery.loadVariantItemModels(ModelBakery.java:175) ~[ModelBakery.class:?]
    at net.minecraftforge.client.model.ModelLoader.setupModelRegistry(ModelLoader.java:151) ~[ModelLoader.class:?]
    at net.minecraft.client.renderer.block.model.ModelManager.onResourceManagerReload(ModelManager.java:28) [ModelManager.class:?]
    at net.minecraft.client.resources.SimpleReloadableResourceManager.registerReloadListener(SimpleReloadableResourceManager.java:121) [SimpleReloadableResourceManager.class:?]
    at net.minecraft.client.Minecraft.init(Minecraft.java:560) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:422) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
    at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
    at GradleStart.main(GradleStart.java:25) [start/:?]
Caused by: java.io.FileNotFoundException: tvdtm:models/item/happy_ball.json
    at net.minecraft.client.resources.SimpleReloadableResourceManager.getResource(SimpleReloadableResourceManager.java:69) ~[SimpleReloadableResourceManager.class:?]
    at net.minecraft.client.renderer.block.model.ModelBakery.loadModel(ModelBakery.java:334) ~[ModelBakery.class:?]
    at net.minecraftforge.client.model.ModelLoader.access$1400(ModelLoader.java:115) ~[ModelLoader.class:?]
    at net.minecraftforge.client.model.ModelLoader$VanillaLoader.loadModel(ModelLoader.java:861) ~[ModelLoader$VanillaLoader.class:?]
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:157) ~[ModelLoaderRegistry.class:?]
    ... 20 more
[16:01:19] [Client thread/ERROR] [FML]: Exception loading model for variant tvdtm:happy_ball#inventory for item "tvdtm:happy_ball", blockstate location exception: 
net.minecraftforge.client.model.ModelLoaderRegistry$LoaderException: Exception loading model tvdtm:happy_ball#inventory with loader VariantLoader.INSTANCE, skipping
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:161) ~[ModelLoaderRegistry.class:?]
    at net.minecraftforge.client.model.ModelLoader.loadItemModels(ModelLoader.java:296) ~[ModelLoader.class:?]
    at net.minecraft.client.renderer.block.model.ModelBakery.loadVariantItemModels(ModelBakery.java:175) ~[ModelBakery.class:?]
    at net.minecraftforge.client.model.ModelLoader.setupModelRegistry(ModelLoader.java:151) ~[ModelLoader.class:?]
    at net.minecraft.client.renderer.block.model.ModelManager.onResourceManagerReload(ModelManager.java:28) [ModelManager.class:?]
    at net.minecraft.client.resources.SimpleReloadableResourceManager.registerReloadListener(SimpleReloadableResourceManager.java:121) [SimpleReloadableResourceManager.class:?]
    at net.minecraft.client.Minecraft.init(Minecraft.java:560) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:422) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
    at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
    at GradleStart.main(GradleStart.java:25) [start/:?]
Caused by: net.minecraft.client.renderer.block.model.ModelBlockDefinition$MissingVariantException
    at net.minecraft.client.renderer.block.model.ModelBlockDefinition.getVariant(ModelBlockDefinition.java:83) ~[ModelBlockDefinition.class:?]
    at net.minecraftforge.client.model.ModelLoader$VariantLoader.loadModel(ModelLoader.java:1175) ~[ModelLoader$VariantLoader.class:?]
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:157) ~[ModelLoaderRegistry.class:?]
    ... 20 more

And a Github:

https://github.com/18gatenmaker/mc-coding-problem/

That is the src folder