[18:23:05] [Server thread/INFO]: [RacesOfThana] Enabling RacesOfThana v2.2.5
> [18:23:05] [Server thread/ERROR]: Error occurred while enabling RacesOfThana v2.2.5 (Is it up to date?)
java.lang.IllegalArgumentException: Material cannot be null
at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:82) ~[spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:70) ~[spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:58) ~[spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at com.zthana.racesofthana.handlers.RaceHandler.refreshRaces(RaceHandler.java:373) ~[?:?]
at com.zthana.racesofthana.handlers.RaceHandler.<init>(RaceHandler.java:57) ~[?:?]
at com.zthana.racesofthana.RacesOfThana.onEnable(RacesOfThana.java:59) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:351) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:432) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugin(CraftServer.java:464) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugins(CraftServer.java:378) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.reload(CraftServer.java:813) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.Bukkit.reload(Bukkit.java:576) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:27) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:713) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchServerCommand(CraftServer.java:698) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at net.minecraft.server.v1_15_R1.DedicatedServer.handleCommandQueue(DedicatedServer.java:443) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:407) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:984) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:824) [spigot-1.15.2.jar:git-Spigot-c574e08-8801905]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]