HeavySpleef error

09:17:57 [ERROR] Exception when Way attempted to tab complete /spleef addpodium Splegg large
org.bukkit.command.CommandException: Unhandled exception during tab completion for command '/spleef addpodium Spleg
g large' in plugin HeavySpleef v2.0-b176-SNAPSHOT
        at org.bukkit.command.PluginCommand.tabComplete(PluginCommand.java:144) ~[spigot-1.8.7-R0.1-SNAPSHOT-latest
.jar:git-Spigot-6d16e64-87b9f46]
        at org.bukkit.command.SimpleCommandMap.tabComplete(SimpleCommandMap.java:213) ~[spigot-1.8.7-R0.1-SNAPSHOT-
latest.jar:git-Spigot-6d16e64-87b9f46]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.tabCompleteCommand(CraftServer.java:1594) [spigot-1.8.7-R0.1-
SNAPSHOT-latest.jar:git-Spigot-6d16e64-87b9f46]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.tabComplete(CraftServer.java:1578) [spigot-1.8.7-R0.1-SNAPSHO
T-latest.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.MinecraftServer.tabCompleteCommand(MinecraftServer.java:1094) [spigot-1.8.7
-R0.1-SNAPSHOT-latest.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1888) [spigot-1.8.7-R0.1-SNAPSHOT-
latest.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.PacketPlayInTabComplete.a(SourceFile:46) [spigot-1.8.7-R0.1-SNAPSHOT-latest
.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.PacketPlayInTabComplete.a(SourceFile:10) [spigot-1.8.7-R0.1-SNAPSHOT-latest
.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.8.7-R0.1-SNAPSHOT-late
st.jar:git-Spigot-6d16e64-87b9f46]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_45]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_45]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SystemUtils.java:19) [spigot-1.8.7-R0.1-SNAPSHOT-latest.jar:g
it-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:714) [spigot-1.8.7-R0.1-SNAPSHOT-lat
est.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot-1.8.7-R0.1-SNAPSHOT-lat
est.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot-1.8.7-R0.1-SNAPSHOT-latest.jar:git-Spigot-6d16e64-87b9f46]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot-1.8.7-R0.1-SNAPSHOT-latest.jar:git-Spigot-6d16e64-87b9f46]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45]
Caused by: java.lang.NullPointerException
        at de.matzefratze123.heavyspleef.commands.base.CommandManagerService.onTabComplete(CommandManagerService.java:234) ~[?:?]
        at org.bukkit.command.PluginCommand.tabComplete(PluginCommand.java:132) ~[spigot-1.8.7-R0.1-SNAPSHOT-latest.jar:git-Spigot-6d16e64-87b9f46]
        ... 16 more