[BuildBattle] Task #2 for BuildBattle v0.1 generated an exception
java.lang.IllegalStateException: Not scheduled yet
	at org.bukkit.scheduler.BukkitRunnable.checkScheduled(BukkitRunnable.java:149) ~[spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at org.bukkit.scheduler.BukkitRunnable.getTaskId(BukkitRunnable.java:143) ~[spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at org.bukkit.scheduler.BukkitRunnable.cancel(BukkitRunnable.java:29) ~[spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at net.minechan.buildbattle.PlayerTimer.run(PlayerTimer.java:13) ~[?:?]
	at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353) [spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:739) [spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot-1.12.2.jar:git-Spigot-7862817-bd30843]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_152]