[20:00:27 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'masuite' in plugin MaSuiteCore v1.5.3-SNAPSHOT
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) ~[minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1399) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1234) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_191]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_191]
        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_191]
Caused by: java.lang.NullPointerException
        at fi.matiaspaavilainen.masuitecore.bukkit.commands.MaSuiteCommand.onCommand(MaSuiteCommand.java:31) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[minecraft_server.jar:git-Spigot-dcd1643-e60fc34]
        ... 15 more