[19:18:33 WARN]: [UrHarc] Task #173 for UrHarc v1.0 generated an exception
java.lang.IllegalArgumentException: Name cannot be null
        at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.getWorld(CraftServer.java:1005) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
        at org.bukkit.Bukkit.getWorld(Bukkit.java:495) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
        at me.TeddHUN.Plugin.VobleCraft.Event.Main.JatekInditas(Main.java:417) ~[?:?]
        at me.TeddHUN.Plugin.VobleCraft.Event.Timer.run(Timer.java:41) ~[?:?]
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:709) [spigot.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [spigot.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [spigot.jar:git-Spigot-c3c767f-33d5de3]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]