Task not running

So in my onEnable() method I have this:
I don't know which run to use.
Would someone give me an example of what an async method does versus a sync method?

Code:java

this.getServer().getScheduler().runTask(this, new Runnable(){
 
public void run() {
 
for(int i = 0; i < leaderboards.size(); i++ ){
String name = leaderboards.get(i);
createSigns(leaderboards.get(i), leaderboardClass.getPoint1(name), leaderboardClass.getPoint2(name));
}
 
}
});

I use this to keep my signs up to date. I don't see any errors in console.

 

Gopaintman
Wait what's the question here?

 

xTrollxDudex
Why the task is not running.

 

Gopaintman
Incorrect parameters

 

I tried multiple different ways of running and followed tutorials and it never runs.

 

Gopaintman
What are you trying to achieve anyways??

 

A "Worker" that will update some signs periodically.