Error regarding "missing" textures and models

[Voidshock]

Hello everyone, i am a new developer whom is currently following step-by-step guides on YouTube to learn the basics.

I have this problem, where intellij IDEA won't recognize my models and textures, does anyone know anything?

 

[10:50:23] [Client thread/ERROR] [FML]: Exception loading model for variant tm:plastic#inventory for item "tm:plastic", normal location exception:
net.minecraftforge.client.model.ModelLoaderRegistry$LoaderException: Exception loading model tm:item/plastic 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:513) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:378) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_265]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_265]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_265]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_265]
    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_265]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_265]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_265]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_265]
    at net.minecraftforge.legacydev.Main.start(Main.java:86) [legacydev-0.2.3.1-fatjar.jar:0.2.3.1+4+372be23]
    at net.minecraftforge.legacydev.MainClient.main(MainClient.java:29) [legacydev-0.2.3.1-fatjar.jar:0.2.3.1+4+372be23]
Caused by: java.io.FileNotFoundException: tm:models/item/plastic.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$VanillaLoader.class:?]
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:157) ~[ModelLoaderRegistry.class:?]
    ... 20 more
[10:50:23] [Client thread/ERROR] [FML]: Exception loading model for variant tm:plastic#inventory for item "tm:plastic", blockstate location exception:
net.minecraftforge.client.model.ModelLoaderRegistry$LoaderException: Exception loading model tm:plastic#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:513) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:378) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_265]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_265]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_265]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_265]
    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_265]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_265]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_265]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_265]
    at net.minecraftforge.legacydev.Main.start(Main.java:86) [legacydev-0.2.3.1-fatjar.jar:0.2.3.1+4+372be23]
    at net.minecraftforge.legacydev.MainClient.main(MainClient.java:29) [legacydev-0.2.3.1-fatjar.jar:0.2.3.1+4+372be23]
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:?]

 

[Voidshock]

PS. it seems to be a problem, where it doesn't recognize the file types inside of the resource folder. But it doesn't allow me to make java packages in it, contrary what the tutorial showed.

[Voidshock]

I know that you're telling the others, that 1.12 isn't supported, but i just nedded help