Looks like there was a problem in the server code. I think I've fixed it now; could you try again and let me know?
import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
/*
* Write a description of class ActorName here.
*
* @author Nosson1459
* @version 1/2/2017
*/
public class ActorName extends Actor
{
/**
* Constructor for objects of class ActorName.
*
*/
public ActorName()
{
}
/**
* Act - do whatever the ActorName wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
// Add your action code here.
}
}