[17:31:29 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'additions' in plugin Additions v2.8.2
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:640) ~[spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_221]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_221]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SystemUtils.java:19) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:714) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]
Caused by: java.lang.NoSuchMethodError: org.bukkit.inventory.meta.ItemMeta.setUnbreakable(Z)V
        at me.gaagjescraft.network.team.advancedevents.menus.MenuItem.getFinalItem(MenuItem.java:131) ~[?:?]
        at me.gaagjescraft.network.team.advancedevents.menus.Menu.getContent(Menu.java:88) ~[?:?]
        at me.gaagjescraft.network.team.advancedevents.menus.Menu.open(Menu.java:123) ~[?:?]
        at me.gaagjescraft.network.team.advancedevents.commands.AdditionsCommand.onCommand(AdditionsCommand.java:149) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-f94fe8f-d27e6d0]
        ... 15 more