TreefarmError

Error occurred while enabling Treefarm v1.0 (Is it up to date?)
java.lang.ExceptionInInitializerError
	at com.gizmomc.gizmotreefarm.GizmoTreefarm.onEnable(GizmoTreefarm.java:21) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:292) ~[patched_1.9.4.jar:git-Paper-754]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:319) [patched_1.9.4.jar:git-Paper-754]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:407) [patched_1.9.4.jar:git-Paper-754]
	at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:363) [PlugMan.jar:?]
	at com.rylinaux.plugman.command.LoadCommand.execute(LoadCommand.java:114) [PlugMan.jar:?]
	at com.rylinaux.plugman.PlugManCommandHandler.onCommand(PlugManCommandHandler.java:95) [PlugMan.jar:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) [patched_1.9.4.jar:git-Paper-754]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152) [patched_1.9.4.jar:git-Paper-754]
	at org.bukkit.craftbukkit.v1_9_R2.CraftServer.dispatchCommand(CraftServer.java:665) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.PlayerConnection.handleCommand(PlayerConnection.java:1387) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:1192) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.PacketPlayInChat.a(PacketPlayInChat.java:5) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13) [patched_1.9.4.jar:git-Paper-754]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_77]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_77]
	at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:786) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:403) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:723) [patched_1.9.4.jar:git-Paper-754]
	at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:622) [patched_1.9.4.jar:git-Paper-754]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_77]
Caused by: java.lang.NullPointerException
	at com.gizmomc.gizmotreefarm.SelectionHandler.<init>(SelectionHandler.java:26) ~[?:?]
	at com.gizmomc.gizmotreefarm.SelectionHandler.<clinit>(SelectionHandler.java:18) ~[?:?]
	... 23 more