Error 1

[12:36:21] [Server thread/ERROR]: Error occurred while enabling RPGInventory v1.3.5 (Is it up to date?)
java.lang.NoSuchMethodError: com.comphenix.protocol.utility.MinecraftReflection.getBukkitItemStack(Lorg/bukkit/inventory/ItemStack;)Lorg/bukkit/inventory/ItemStack;
	at ru.endlesscode.rpginventory.utils.ItemUtils.toBukkitItemStack(ItemUtils.java:218) ~[?:?]
	at ru.endlesscode.rpginventory.utils.ItemUtils.setTag(ItemUtils.java:47) ~[?:?]
	at ru.endlesscode.rpginventory.inventory.InventoryLocker.addId(InventoryLocker.java:100) ~[?:?]
	at ru.endlesscode.rpginventory.inventory.InventoryLocker.init(InventoryLocker.java:45) ~[?:?]
	at ru.endlesscode.rpginventory.RPGInventory.onEnable(RPGInventory.java:135) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[spigot.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:414) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:378) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:333) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot.jar:git-Spigot-db6de12-18fbb24]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]