[14:36:15 WARN]: Exception in thread "Craft Scheduler Thread - 31" [14:36:15 WARN]: org.apache.commons.lang.UnhandledException: Plugin CraftingStore v2.0.6 generated an exception while executing task 8451 at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at net.craftingstore.bukkit.inventory.InventoryBuilder.buildInventory(InventoryBuilder.java:23) at net.craftingstore.bukkit.inventory.InventoryBuilder.buildInventory(InventoryBuilder.java:19) at net.craftingstore.bukkit.commands.BuyCommand.lambda$onCommand$0(BuyCommand.java:38) at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53) ... 3 more