[11:48:48 WARN]: Exception in thread "Craft Scheduler Thread - 52"
[11:48:48 WARN]: org.apache.commons.lang.UnhandledException: Plugin BedWars1058 v0.9.12beta (API 13) generated an exception while executing task 130521
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: net.minecraft.server.v1_8_R3.CancelledPacketHandleException