Bukkit

What steps will reproduce the problem?
1. Start the server with GAListener
2. Wait a few minutes and the error will start to popup
3.

What is the expected output? What do you see instead?
I expect to see no errors

What version of the product are you using?
Bukkit Version: CraftBukkit version git-Bukkit-53fac9f (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT)
GAListener Version: 1.3.2
Votifier Version: 1.8

Do you have an error log of what happened?
Every 5 or so minutes I get the following error in the console (no matter whether there are or are not any players on the server):

<<code>>[00:02:02] [pool-3-thread-102/WARN]: Exception in thread "pool-3-thread-102" [00:02:02] [pool-3-thread-102/WARN]: org.apache.commons.lang.UnhandledException: Plugin GAListener v1.3.2 generated an exception while executing task 60 at org.bukkit.craftbukkit.v1_8_R3.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.NoSuchMethodError: org.bukkit.Server._INVALID_getOnlinePlayers()[Lorg/bukkit/entity/Player; at com.swifteh.GAL.Metrics.postPlugin(Metrics.java:335) at com.swifteh.GAL.Metrics.access$4(Metrics.java:328) at com.swifteh.GAL.Metrics$1.run(Metrics.java:223) at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:53) at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53) ... 3 more

[00:02:03] [Server thread/WARN]: [GAListener] Task #59 for GAListener v1.3.2 generated an exception java.lang.NoSuchMethodError: org.bukkit.Server._INVALID_getOnlinePlayers()[Lorg/bukkit/entity/Player; at com.swifteh.GAL.GAL$6.run(GAL.java:409) [?:?] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:53) [craftbukkit-BT42-1.8.8.jar:git-Bukkit-53fac9f] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:349) [craftbukkit-BT42-1.8.8.jar:git-Bukkit-53fac9f] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:679) [craftbukkit-BT42-1.8.8.jar:git-Bukkit-53fac9f] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [craftbukkit-BT42-1.8.8.jar:git-Bukkit-53fac9f] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:628) [craftbukkit-BT42-1.8.8.jar:git-Bukkit-53fac9f] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:536) [craftbukkit-BT42-1.8.8.jar:git-Bukkit-53fac9f] at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60] <</code>>

Please provide any additional information below.