Caused by: java.lang.NullPointerException
at com.guillaumevdn.questcreator.module.gui.QGui$2.fill(QGui.java:206) ~[?:?]
at com.guillaumevdn.gcore.lib.gui.FilledGUI.open(FilledGUI.java:51) ~[?:?]
at com.guillaumevdn.gcore.lib.gui.FilledGUI.open(FilledGUI.java:42) ~[?:?]
at com.guillaumevdn.questcreator.commands.ArgMenu.perform(ArgMenu.java:39) ~[?:?]
at com.guillaumevdn.gcore.lib.command.CommandArgument.call(CommandArgument.java:215) ~[?:?]
at com.guillaumevdn.gcore.lib.command.CommandArgument.call(CommandArgument.java:184) ~[?:?]
at com.guillaumevdn.gcore.lib.command.CommandRoot.onCommand(CommandRoot.java:52) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[patched_1.14.4.jar:git-Paper-218]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.14.4.jar:git-Paper-218]
at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchCommand(CraftServer.java:739) ~[patched_1.14.4.jar:git-Paper-218]
at org.bukkit.Bukkit.dispatchCommand(Bukkit.java:660) ~[patched_1.14.4.jar:git-Paper-218]
at com.guillaumevdn.questcreator.commands.ArgRoot.perform(ArgRoot.java:22) ~[?:?]
at com.guillaumevdn.gcore.lib.command.CommandArgument.call(CommandArgument.java:215) ~[?:?]
at com.guillaumevdn.gcore.lib.command.CommandRoot.onCommand(CommandRoot.java:52) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[patched_1.14.4.jar:git-Paper-218]
... 17 more