[18:17:17 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'acb' in plugin GriefPrevention v9.8
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-6d85d97-b389396]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-6d85d97-b389396]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:645) ~[spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerConnection.java:1115) [spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:950) [spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:53) [spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-6d85d97-b389396]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_25]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_25]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:683) [spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623) [spigot.jar:git-Spigot-6d85d97-b389396]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:526) [spigot.jar:git-Spigot-6d85d97-b389396]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
Caused by: java.lang.NullPointerException
        at me.ryanhamshire.GriefPrevention.DatabaseDataStore.getPlayerDataFromStorage(DatabaseDataStore.java:493) ~[?:?]
        at me.ryanhamshire.GriefPrevention.PlayerData.loadDataFromSecondaryStorage(PlayerData.java:196) ~[?:?]
        at me.ryanhamshire.GriefPrevention.PlayerData.getLastLogin(PlayerData.java:184) ~[?:?]
        at me.ryanhamshire.GriefPrevention.DatabaseDataStore.savePlayerData(DatabaseDataStore.java:529) ~[?:?]
        at me.ryanhamshire.GriefPrevention.DatabaseDataStore.saveGroupBonusBlocks(DatabaseDataStore.java:578) ~[?:?]
        at me.ryanhamshire.GriefPrevention.DataStore.adjustGroupBonusBlocks(DataStore.java:279) ~[?:?]
        at me.ryanhamshire.GriefPrevention.GriefPrevention.onCommand(GriefPrevention.java:1699) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-6d85d97-b389396]
        ... 14 more