Hi, I've been using the latest version of the brass modpack, and it's been working without issue for the past couple of days. Today, I started getting into the Rats mod in the pack, and I had gotten around 12 rats doing various tasks when the game crashed, and I can't open the world back up without crashing and getting the same message. I can't figure out the issue, something to do with rats failing to render? Thanks in advance for any help.

Reported exception thrown!
net.minecraft.crash.ReportedException: Rendering entity in world
at net.minecraft.client.renderer.entity.EntityRendererManager.func_229084_a_(EntityRendererManager.java:279)
at net.minecraft.client.renderer.WorldRenderer.func_228418_a_(WorldRenderer.java:1202)
at net.minecraft.client.renderer.WorldRenderer.func_228426_a_(WorldRenderer.java:1010)
at net.minecraft.client.renderer.GameRenderer.func_228378_a_(GameRenderer.java:607)
at net.minecraft.client.renderer.GameRenderer.func_195458_a(GameRenderer.java:425)
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:976)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607)
at net.minecraft.client.main.Main.main(Main.java:184)
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.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51)
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$473/1544765522.call(Unknown Source)
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82)
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
Caused by: java.lang.NoClassDefFoundError: com/github/alexthe666/rats/client/render/entity/RenderRatProtector$Overlay
at com.github.alexthe666.rats.client.event.ClientEvents.onLivingRender(ClientEvents.java:471)
at net.minecraftforge.eventbus.ASMEventHandler_578_ClientEvents_onLivingRender_Post.invoke(.dynamic)
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85)
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:297)
at net.minecraft.client.renderer.entity.LivingRenderer.func_225623_a_(LivingRenderer.java:131)
at net.minecraft.client.renderer.entity.MobRenderer.func_225623_a_(SourceFile:43)
at net.minecraft.client.renderer.entity.MobRenderer.func_225623_a_(SourceFile:18)
at net.minecraft.client.renderer.entity.EntityRendererManager.func_229084_a_(EntityRendererManager.java:251)
... 18 more
Caused by: java.lang.ClassNotFoundException: com.github.alexthe666.rats.client.render.entity.RenderRatProtector$Overlay
at java.lang.ClassLoader.findClass(ClassLoader.java:530)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:106)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 26 more
Suppressed: java.lang.ClassNotFoundException: Failed to find class bytes for com.github.alexthe666.rats.client.render.entity.RenderRatProtector$Overlay
at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:260)
at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:136)
at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:98)
... 27 more
Caused by: java.nio.channels.ClosedChannelException
at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:109)
at sun.nio.ch.FileChannelImpl.position(FileChannelImpl.java:275)
at sun.nio.ch.FileChannelImpl.position(FileChannelImpl.java:49)
at com.sun.nio.zipfs.ZipFileSystem.readFullyAt(ZipFileSystem.java:952)
at com.sun.nio.zipfs.ZipFileSystem.readFullyAt(ZipFileSystem.java:945)
at com.sun.nio.zipfs.ZipFileSystem.getDataPos(ZipFileSystem.java:931)
at com.sun.nio.zipfs.ZipFileSystem.access$400(ZipFileSystem.java:80)
at com.sun.nio.zipfs.ZipFileSystem$EntryInputStream.(ZipFileSystem.java:1472)
at com.sun.nio.zipfs.ZipFileSystem.getInputStream(ZipFileSystem.java:1402)
at com.sun.nio.zipfs.ZipFileSystem.newInputStream(ZipFileSystem.java:547)
at com.sun.nio.zipfs.ZipPath.newInputStream(ZipPath.java:645)
at com.sun.nio.zipfs.ZipFileSystemProvider.newInputStream(ZipFileSystemProvider.java:278)
at java.nio.file.Files.newInputStream(Files.java:152)
at net.minecraftforge.fml.loading.ModJarURLHandler$ModJarURLConnection.getInputStream(ModJarURLHandler.java:87)
at cpw.mods.modlauncher.TransformingClassLoader$AutoURLConnection.(TransformingClassLoader.java:174)
at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:247)
... 29 more