Getting UUID value

Code:java

Bukkit.getScheduler().scheduleAsyncRepeatingTask(Main.plugin, new Runnable() {
 
                    @Override
                    public void run() {
 
                        for(int rentID : Main.rentids) {
                            if(Main.plugin.getConfig().getBoolean(rentID + ".rent") == false) {
                                ProtectedRegion region = WGBukkit.getRegionManager(Bukkit.getWorld("world")).getRegion(Main.plugin.getConfig().getString(rentID + ".region"));
                                region.getMembers().removePlayer(Bukkit.getPlayer(Main.plugin.getConfig().getString(rentID + ".user")).getName());
                                sign.setLine(0, "[§6§lMieten§r]");
                                sign.setLine(1, Main.plugin.getConfig().get(rentID + ".line1").toString());
                                sign.setLine(1, Main.plugin.getConfig().get(rentID + ".line2").toString());
                                sign.setLine(1, Main.plugin.getConfig().get(rentID + ".line3").toString());
                            }
                        }
 
                    }
                }, 0, 1200L);

Code:

[21:38:16] [pool-3-thread-57/WARN]: Exception in thread "pool-3-thread-57"
[21:38:16] [pool-3-thread-57/WARN]: org.apache.commons.lang.UnhandledException: Plugin Grundstuecke v1.0 generated an exception while executing task 50
    at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
    at me.craftwood.grundstuecke.PlayerInteractListener$1.run(PlayerInteractListener.java:122)
    at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask.run(CraftTask.java:53)
    at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
    ... 3 more

Line 122 is

Code:java

region.getMembers().removePlayer(Bukkit.getPlayer(Main.plugin.getConfig().getString(rentID + ".user")).getName());

where I try to get the UUID from my config file and then get the actual player name.

solved

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