NullpointerException error

I need help with some code I was doing a tutorial and am fairly new to minecraft java, but have had this issue a couple of times so here are my scripts and tell me please what the problem is. the problem is in the second screenie. it has a nullpointerexception and when I go to minecraft the command won't register, but the plugin does show up.

 

well the plugin works, but when I enter the command nothing happens

well the plugin works, but when I enter the command nothing happens

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

@dumbowithquestions do your plugin load ? i dun think the plugin.yml in the folder ressources will do the job

 

It looks like OP is using the Minecraft Dev Intellij plugin, it auto setup the plugin.yml right where its supposed to be so its probably something else.

I suggest you add some debug statements in your command executor to see if its running at all when you execute the command.

 

I'd also recommend that you do not use System.out.println; use the logger. There is also no need to send the enable message; the server already sends enable messages.

 

@dumbowithquestions
idk if this might be the problem but in your plugin.yml i see you called it "alias" instead of "aliases", that may be the problem, Here is a doc showing how you should use the plugin.yml
https://bukkit.gamepedia.com/Plugin_YAML