Not work
My logs
https://pastebin.com/Mhvyc1sW
[03:39:45] [Server thread/ERROR]: Could not pass event ShopTransactionEvent to ScreamingBedwarsAddon v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:319) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at org.screamingsandals.bedwars.lib.sgui.listeners.InventoryListener.onInventoryClick(InventoryListener.java:171) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor38.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:2148) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.PacketPlayInWindowClick.a(SourceFile:32) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.PacketPlayInWindowClick.a(SourceFile:10) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(SourceFile:144) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(SourceFile:118) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.MinecraftServer.ba(MinecraftServer.java:918) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:911) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(SourceFile:127) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:895) [server.jar:git-Spigot-a99063f-be6aaf0]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:828) [server.jar:git-Spigot-a99063f-be6aaf0]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.NullPointerException
at java.util.Objects.requireNonNull(Objects.java:221) ~[?:?]
at org.pronze.bwaddon.inventories.customShop.handleBuy(customShop.java:471) ~[?:?]
at org.pronze.bwaddon.inventories.customShop.onShopTransaction(customShop.java:283) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor62.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) ~[server.jar:git-Spigot-a99063f-be6aaf0]
... 25 more