[15:42:47] [Server thread/ERROR] [net.minecraft.command.CommandHandler/]: Couldn't process command
java.lang.NoClassDefFoundError: ru/tehkode/permissions/bukkit/PermissionsEx
	at hohserg.ib.server.BukkitApi$.givePex(BukkitApi.scala:20) ~[BukkitApi$.class:?]
	at hohserg.ib.server.CommandHandler.givePex(CommandHandler.scala:18) ~[CommandHandler.class:?]
	at hohserg.ib.server.CommandHandler$$anonfun$prepareCraftPex$1.apply(CommandHandler.scala:26) ~[CommandHandler$$anonfun$prepareCraftPex$1.class:?]
	at hohserg.ib.server.CommandHandler$$anonfun$prepareCraftPex$1.apply(CommandHandler.scala:21) ~[CommandHandler$$anonfun$prepareCraftPex$1.class:?]
	at scala.Option.flatMap(Option.scala:170) ~[Option.class:?]
	at hohserg.ib.server.CommandHandler.prepareCraftPex(CommandHandler.scala:21) ~[CommandHandler.class:?]
	at hohserg.ib.server.CommandHandler.func_71515_b(CommandHandler.scala:96) ~[CommandHandler.class:?]
	at org.ultramine.commands.VanillaCommandWrapper.func_71515_b(VanillaCommandWrapper.java:48) ~[VanillaCommandWrapper.class:?]
	at net.minecraft.command.CommandHandler.func_71556_a(CommandHandler.java:90) ~[z.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:761) ~[nh.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:740) ~[nh.class:?]
	at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:38) ~[ir.class:?]
	at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:53) ~[ir.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:231) ~[ej.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) ~[nc.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:692) ~[MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:332) ~[lt.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:566) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:443) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:718) ~[li.class:?]
Caused by: java.lang.ClassNotFoundException: ru.tehkode.permissions.bukkit.PermissionsEx
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:107) ~[launchwrapper-1.11.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_151]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_151]