Development Assistance NullPointerException Error

Hello. I have recently been developing a plugin and I keep getting a NullPointerException error around this chunk of code:

I understand that a NullPointerException error is due to something wanted to be accessed however it is equal to null. But I can't seem to find out where this is happening.

Here is the actual error returned:


Any help would be appreciated. Thanks.

 

I believe it's pointing at this line

I thought it might be because it = 0, but then again that's not null, that's still a value, and I've tested it with 1, which returns the same error.

And sorry if my code is crap and inefficient, I'm not good at that, I just make it so it works haha.

Oh I'll also just add, this chunk of code is designed to go through each player online and add them evenly to either the Red or Blue team and teleport them to their spawnpoint. This is a minigame plugin, for an upcoming minigame server.

 

Oh nevermind, this is on line 24:

Code:

 plugin.stopCountdown(); 

Which links to

Code:

public void stopCountdown(){
        getServer().getScheduler().cancelTask(startCountdownID);
    }