INFO] coolboy93 issued server command: /blacksmith null null

[ERROR] null

org.bukkit.command.CommandException: Unhandled exception executing command 'blacksmith' in plugin BlackSmith v1.0-SNAPSHOT

at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) ~[spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1397) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1232) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]

at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]

at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]

Caused by: java.lang.NumberFormatException: For input string: "null"

at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043) ~[?:1.8.0_212]

at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110) ~[?:1.8.0_212]

at java.lang.Double.parseDouble(Double.java:538) ~[?:1.8.0_212]

at com.jumbo1907.blacksmith.commands.BlackSmithCommand.onCommand(BlackSmithCommand.java:92) ~[?:?]

at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.12.2.jar:git-Spigot-eb3d921-2b93d83]

... 15 more