Youtuber Plugin Error

18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:47)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:814)
18.04 18:31:58 [Server] WARN at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:952)
18.04 18:31:58 [Server] WARN at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:683)
18.04 18:31:58 [Server] WARN at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:175)
18.04 18:31:58 [Server] WARN at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
18.04 18:31:58 [Server] WARN at TrpkGod.Youtuber.CommandManager.onCommand(CommandManager.java:120)
18.04 18:31:58 [Server] WARN at TrpkGod.Youtuber.Commands.Twitch.AddLiveStreamer.run(AddLiveStreamer.java:24)
18.04 18:31:58 [Server] WARN at TrpkGod.Youtuber.SettingsManager.addTwitch(SettingsManager.java:57)
18.04 18:31:58 [Server] WARN java.lang.NullPointerException