[22:39:45] [Server thread/ERROR]: Could not pass event BlockBreakEvent to PrisonUtils v1.7
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerInteractManager.breakBlock(PlayerInteractManager.java:286) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerInteractManager.a(PlayerInteractManager.java:189) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:623) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PacketPlayInBlockDig.a(SourceFile:40) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PacketPlayInBlockDig.a(SourceFile:10) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_91]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_91]
	at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]
Caused by: java.lang.NullPointerException
	at java.util.Date.getMillisOf(Date.java:958) ~[?:1.8.0_91]
	at java.util.Date.after(Date.java:931) ~[?:1.8.0_91]
	at me.mrCookieSlime.QuickSell.boosters.Booster.update(Booster.java:215) ~[?:?]
	at me.mrCookieSlime.QuickSell.boosters.Booster.getBoosters(Booster.java:228) ~[?:?]
	at me.mrCookieSlime.QuickSell.Shop.handoutReward(Shop.java:189) ~[?:?]
	at me.mrCookieSlime.QuickSell.Shop.sell(Shop.java:166) ~[?:?]
	at me.mrCookieSlime.PrisonUtils.MiningListener.handleMining(MiningListener.java:298) ~[?:?]
	at me.mrCookieSlime.PrisonUtils.MiningListener.onBlockBreak(MiningListener.java:195) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor281.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_91]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_91]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-latest.jar:git-Spigot-db6de12-18fbb24]
	... 17 more