[09:55:52 WARN]: Exception in thread "Craft Scheduler Thread - 50"
[09:55:52 WARN]: org.apache.commons.lang.UnhandledException: Plugin BetterShops v2.1.2 generated an exception while executing task 401
        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.NullPointerException
        at max.hubbard.bettershops.Shops.Items.SQLShopItem.getSlot(SQLShopItem.java:338)
        at max.hubbard.bettershops.Menus.ShopMenus.OwnerSelling.draw(OwnerSelling.java:306)
        at max.hubbard.bettershops.Menus.ShopMenus.ItemManagerSelling$7.onAction(ItemManagerSelling.java:369)
        at max.hubbard.bettershops.Listeners.ClickableActionListener$1.run(ClickableActionListener.java:51)
        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