Bukkit

What steps will reproduce the problem?
1. Start server
2.
3.

What is the expected output? What do you see instead?
Expected no errors...

and see this:

[09:21:07] [Server thread/INFO]: Starting GS4 status listener
[09:21:07] [Query Listener #1/INFO]: Query running on 69.175.6.149:25565
[09:21:07] [Craft Scheduler Thread - 2/INFO]: [GAListener] Connection established!
[09:21:07] [Craft Scheduler Thread - 2/WARN]: Exception in thread "Craft Scheduler Thread - 2"
[09:21:07] [Craft Scheduler Thread - 2/WARN]: org.apache.commons.lang.UnhandledException: Plugin GAListener v1.4.5 generated an exception while executing task 77
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at java.util.UUID.fromString(UUID.java:192)
    at com.swifteh.GAL.j.a(SourceFile:824)
    at com.swifteh.GAL.o.run(SourceFile:426)
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
    ... 3 more

What version of the product are you using?
latest version for 1.9

Do you have an error log of what happened?

[09:21:07] [Server thread/INFO]: Starting GS4 status listener
[09:21:07] [Query Listener #1/INFO]: Query running on 69.175.6.149:25565
[09:21:07] [Craft Scheduler Thread - 2/INFO]: [GAListener] Connection established!
[09:21:07] [Craft Scheduler Thread - 2/WARN]: Exception in thread "Craft Scheduler Thread - 2"
[09:21:07] [Craft Scheduler Thread - 2/WARN]: org.apache.commons.lang.UnhandledException: Plugin GAListener v1.4.5 generated an exception while executing task 77
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at java.util.UUID.fromString(UUID.java:192)
    at com.swifteh.GAL.j.a(SourceFile:824)
    at com.swifteh.GAL.o.run(SourceFile:426)
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
    ... 3 more

and sometimes in game it says the same error when someone connects with qued votes

Please provide any additional information below.
It's working fine but it does spam this error

[09:21:07] [Server thread/INFO]: Starting GS4 status listener
[09:21:07] [Query Listener #1/INFO]: Query running on 69.175.6.149:25565
[09:21:07] [Craft Scheduler Thread - 2/INFO]: [GAListener] Connection established!
[09:21:07] [Craft Scheduler Thread - 2/WARN]: Exception in thread "Craft Scheduler Thread - 2"
[09:21:07] [Craft Scheduler Thread - 2/WARN]: org.apache.commons.lang.UnhandledException: Plugin GAListener v1.4.5 generated an exception while executing task 77
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at java.util.UUID.fromString(UUID.java:192)
    at com.swifteh.GAL.j.a(SourceFile:824)
    at com.swifteh.GAL.o.run(SourceFile:426)
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
    at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
    ... 3 more