[22:30:07 FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R3/ContainerAnvil (wrong name: net/minecraft/server/ContainerAnvil)
        at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_181]
        at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_181]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:45) [TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:774) [TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R3/ContainerAnvil (wrong name: net/minecraft/server/ContainerAnvil)
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_181]
        at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[?:1.8.0_181]
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_181]
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[?:1.8.0_181]
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[?:1.8.0_181]
        at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[?:1.8.0_181]
        at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[?:1.8.0_181]
        at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_181]
        at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[?:1.8.0_181]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_181]
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[?:1.8.0_181]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_181]
        at net.minecraft.server.v1_8_R3.BlockAnvil.interact(BlockAnvil.java:33) ~[TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.PlayerInteractManager.interact(PlayerInteractManager.java:496) ~[TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:763) ~[TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:52) ~[TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:1) ~[TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) ~[TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_181]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_181]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) ~[TacoSpigotCWupdate.jar:git-PaperSpigot-"4c7641d"]
        ... 5 more