[23:16:31] [Server thread/INFO]: [LagAssist] Enabling LagAssist v2.15.4
[23:16:31] [Server thread/INFO]: §c§lLag§f§lAssist §e» §fEnabling Systems:
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fSmart Mob Tools.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fHopper Manager.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fRedstone Culler.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fPhysics-Tweaker.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fLag Monitor.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fMapVisualizer.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fChunk Analyser.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fChunk Limiter.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fStatsAnalyse.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fLogCleaner System.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fSpawner Manager.
[23:16:31] [Server thread/INFO]:     §e[§a✔§e] §fInjecting PacketListener.
[23:16:31] [Server thread/ERROR]: Error occurred while enabling LagAssist v2.15.4 (Is it up to date?)
java.lang.IllegalArgumentException: Material cannot be null
	at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:70) ~[spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:58) ~[spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at cx.sfy.LagAssist.utils.V1_12.getStatics(V1_12.java:18) ~[?:?]
	at cx.sfy.LagAssist.utils.VersionMgr.getStatics(VersionMgr.java:22) ~[?:?]
	at cx.sfy.LagAssist.gui.DataGUI.setItems(DataGUI.java:72) ~[?:?]
	at cx.sfy.LagAssist.gui.DataGUI.Enabler(DataGUI.java:58) ~[?:?]
	at cx.sfy.LagAssist.Main.EnableClasses(Main.java:83) ~[?:?]
	at cx.sfy.LagAssist.Main.onEnable(Main.java:56) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:346) [spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:408) [spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at org.bukkit.craftbukkit.v1_14_R1.CraftServer.enablePlugin(CraftServer.java:458) [spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at org.bukkit.craftbukkit.v1_14_R1.CraftServer.enablePlugins(CraftServer.java:372) [spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:439) [spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at net.minecraft.server.v1_14_R1.DedicatedServer.init(DedicatedServer.java:258) [spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:749) [spigot-1.14-pre5.jar:git-Spigot-dc58fe4-14df075]
	at java.lang.Thread.run(Thread.java:834) [?:?]
[23:16:31] [Server thread/INFO]: Server permissions file permissions.yml is empty, ignoring it
[23:16:31] [Server thread/INFO]: Done (9.177s)! For help, type "help"
[23:16:31] [Craft Scheduler Thread - 0/INFO]: §c§lLag§f§lAssist §e» §fYou are up to date with LagAssist.
>pl
[23:16:47] [Server thread/INFO]: Plugins (1): LagAssist
>ver
[23:16:50] [Server thread/INFO]: This server is running CraftBukkit version git-Spigot-dc58fe4-14df075 (MC: 1.14 Pre-Release 5) (Implementing API version 1.14-pre5-SNAPSHOT)
[23:16:50] [Server thread/INFO]: Checking version, please wait...
[23:16:50] [Thread-5/INFO]: You are running the latest version
>