Have a reoccurring crash when I open my world - attempted to hopper some oak planks into the crafter to make sticks and got the crash. Here is the log:

20:30:51.004
Exception loading model for variant rustichromia:cotton_seed#normal
net.minecraftforge.client.model.ModelLoaderRegistry$LoaderException: Exception loading model rustichromia:cotton_seed#normal with loader VariantLoader.INSTANCE, skipping
at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:161)
at net.minecraftforge.client.model.ModelLoader.func_177569_a(ModelLoader.java:235)
at net.minecraft.client.renderer.block.model.ModelBakery.loadBlock(ModelBakery.java:153)
at net.minecraftforge.client.model.ModelLoader.func_188640_b(ModelLoader.java:223)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:150)
at net.minecraft.client.renderer.block.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:121)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:513)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: net.minecraft.client.renderer.block.model.ModelBlockDefinition$MissingVariantException
at net.minecraft.client.renderer.block.model.ModelBlockDefinition.func_188004_c(ModelBlockDefinition.java:83)
at net.minecraftforge.client.model.ModelLoader$VariantLoader.loadModel(ModelLoader.java:1175)
at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:157)
... 15 more
20:30:51.010
Exception loading blockstate for the variant rustichromia:cotton_seed#normal:
java.lang.Exception: Could not load model definition for variant rustichromia:cotton_seed
at net.minecraftforge.client.model.ModelLoader.func_177586_a(ModelLoader.java:269)
at net.minecraft.client.renderer.block.model.ModelBakery.loadBlock(ModelBakery.java:121)
at net.minecraftforge.client.model.ModelLoader.func_188640_b(ModelLoader.java:223)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:150)
at net.minecraft.client.renderer.block.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:121)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:513)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.RuntimeException: Encountered an exception when loading model definition of model rustichromia:blockstates/cotton_seed.json
at net.minecraft.client.renderer.block.model.ModelBakery.func_188632_a(ModelBakery.java:228)
at net.minecraft.client.renderer.block.model.ModelBakery.func_177586_a(ModelBakery.java:208)
at net.minecraftforge.client.model.ModelLoader.func_177586_a(ModelLoader.java:265)
... 14 more
Caused by: java.io.FileNotFoundException: rustichromia:blockstates/cotton_seed.json
at net.minecraft.client.resources.FallbackResourceManager.func_135056_b(FallbackResourceManager.java:104)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_135056_b(SimpleReloadableResourceManager.java:79)
at net.minecraft.client.renderer.block.model.ModelBakery.func_188632_a(ModelBakery.java:221)
... 16 more
20:30:52.573
Failed to load bookmarked ItemStack from json string, the item no longer exists:
{id:"primal:steel_plate",Count:1b,Damage:0s}
20:30:52.574
Failed to load bookmarked ItemStack from json string, the item no longer exists:
{id:"primal:tamahagane_plate",Count:1b,Damage:0s}
20:30:52.824
Skipping bad option: lastServer:
20:31:05.300
Encountered an unexpected exception
net.minecraft.util.ReportedException: Ticking block entity
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:773)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException
at java.util.ArrayList$Itr.remove(ArrayList.java:864)
at rustichromia.recipe.AssemblerRecipe.matches(AssemblerRecipe.java:42)
at rustichromia.recipe.RecipeRegistry.getAssemblerRecipe(RecipeRegistry.java:75)
at rustichromia.tile.TileEntityAssembler.findRecipe(TileEntityAssembler.java:150)
at rustichromia.tile.TileEntityAssembler.findRecipe(TileEntityAssembler.java:35)
at rustichromia.tile.TileEntityBasicMachine.func_73660_a(TileEntityBasicMachine.java:82)
at rustichromia.tile.TileEntityAssembler.func_73660_a(TileEntityAssembler.java:139)
at net.minecraft.world.World.func_72939_s(World.java:1838)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767)
... 4 more
20:31:05.310
This crash report has been saved to: C:\Users\Ethan\Twitch\Minecraft\Instances\Actually 1 mod\crash-reports\crash-2020-02-24_20.31.05-server.txt
20:31:06.977
Process crashed with exit code -1

Mod list: