[18:44:15] [Server thread/ERROR]: Could not pass event InventoryClickEvent to VillageDefense v4.2.1
org.bukkit.event.EventException: null
	at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:72) ~[paper.jar:git-Paper-470]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[paper.jar:git-Paper-470]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[paper.jar:git-Paper-470]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:513) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:2313) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:33) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:10) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:12) ~[paper.jar:git-Paper-470]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_181]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_181]
	at net.minecraft.server.v1_13_R2.SystemUtils.a(SystemUtils.java:109) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:1016) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:439) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:943) ~[paper.jar:git-Paper-470]
	at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:841) ~[paper.jar:git-Paper-470]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
Caused by: java.lang.NullPointerException
	at java.lang.String.contains(String.java:2133) ~[?:1.8.0_181]
	at pl.plajer.villagedefense.arena.managers.ShopManager.lambda$registerShop$1(ShopManager.java:160) ~[?:?]
	at pl.plajer.villagedefense.utils.inventoryframework.pane.StaticPane.click(StaticPane.java:185) ~[?:?]
	at pl.plajer.villagedefense.utils.inventoryframework.Gui.onInventoryClick(Gui.java:545) ~[?:?]
	at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor205.execute(Unknown Source) ~[?:?]
	at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:70) ~[paper.jar:git-Paper-470]
	... 15 more