[21:38:07] [Client thread/ERROR] [FML]: Exception loading model for variant simpleachievements:achievement_stand#has_book=false for blockstate "simpleachievements:achievement_stand[has_book=false]"
net.minecraftforge.client.model.ModelLoaderRegistry$LoaderException: Exception loading model simpleachievements:achievement_stand#has_book=false with loader VariantLoader.INSTANCE, skipping
	at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:134) ~[ModelLoaderRegistry.class:?]
	at net.minecraftforge.client.model.ModelLoader.registerVariant(ModelLoader.java:222) ~[ModelLoader.class:?]
	at net.minecraft.client.renderer.block.model.ModelBakery.loadBlock(ModelBakery.java:145) ~[ModelBakery.class:?]
	at net.minecraftforge.client.model.ModelLoader.loadBlocks(ModelLoader.java:210) ~[ModelLoader.class:?]
	at net.minecraftforge.client.model.ModelLoader.setupModelRegistry(ModelLoader.java:127) ~[ModelLoader.class:?]
	at net.minecraft.client.renderer.block.model.ModelManager.onResourceManagerReload(ModelManager.java:28) [ModelManager.class:?]
	at net.minecraft.client.resources.SimpleReloadableResourceManager.notifyReloadListeners(SimpleReloadableResourceManager.java:131) [SimpleReloadableResourceManager.class:?]
	at net.minecraft.client.resources.SimpleReloadableResourceManager.reloadResources(SimpleReloadableResourceManager.java:112) [SimpleReloadableResourceManager.class:?]
	at net.minecraft.client.Minecraft.refreshResources(Minecraft.java:797) [Minecraft.class:?]
	at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:332) [FMLClientHandler.class:?]
	at net.minecraft.client.Minecraft.startGame(Minecraft.java:559) [Minecraft.class:?]
	at net.minecraft.client.Minecraft.run(Minecraft.java:384) [Minecraft.class:?]
	at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
	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_91]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
	at GradleStart.main(GradleStart.java:26) [start/:?]
Caused by: net.minecraft.client.renderer.block.model.ModelBlockDefinition$MissingVariantException
	at net.minecraft.client.renderer.block.model.ModelBlockDefinition.getVariant(ModelBlockDefinition.java:78) ~[ModelBlockDefinition.class:?]
	at net.minecraftforge.client.model.ModelLoader$VariantLoader.loadModel(ModelLoader.java:1164) ~[ModelLoader$VariantLoader.class:?]
	at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:130) ~[ModelLoaderRegistry.class:?]
	... 24 more