[00:50:20] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'b' in plugin VoxelSniper v5.169.0-SNAPSHOT-jnks288-git3d11e5e
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-1324]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:175) ~[spigot.jar:git-Spigot-1324]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:704) ~[spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:984) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:829) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:147) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(ServerConnection.java:77) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:700) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:562) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:469) [spigot.jar:git-Spigot-1324]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1324]
Caused by: java.lang.NullPointerException
    at com.thevoxelbox.voxelsniper.libs.com.google.common.base.Preconditions.checkNotNull(Preconditions.java:191) ~[?:?]
    at com.thevoxelbox.voxelsniper.libs.com.google.common.primitives.Primitives.wrap(Primitives.java:109) ~[?:?]
    at com.thevoxelbox.voxelsniper.libs.com.google.common.collect.MutableClassToInstanceMap.cast(MutableClassToInstanceMap.java:82) ~[?:?]
    at com.thevoxelbox.voxelsniper.libs.com.google.common.collect.MutableClassToInstanceMap.getInstance(MutableClassToInstanceMap.java:78) ~[?:?]
    at com.thevoxelbox.voxelsniper.Sniper$SniperTool.getCurrentBrush(Sniper.java:513) ~[?:?]
    at com.thevoxelbox.voxelsniper.Sniper.getBrush(Sniper.java:300) ~[?:?]
    at com.thevoxelbox.voxelsniper.VoxelSniperListener.commandSniperB(VoxelSniperListener.java:233) ~[?:?]
    at com.thevoxelbox.voxelsniper.VoxelSniperListener.onCommand(VoxelSniperListener.java:114) ~[?:?]
    at com.thevoxelbox.voxelsniper.VoxelSniper.onCommand(VoxelSniper.java:124) ~[?:?]
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1324]
    ... 13 more