18.01 22:04:33 [Server] ERROR Could not pass event PlayerQuitEvent to Backpack v2.1.2
18.01 22:04:33 [Server] INFO org.bukkit.event.EventException: null
18.01 22:04:33 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerList.disconnect(PlayerList.java:399) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1102) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.NetworkManager.handleDisconnection(NetworkManager.java:321) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.ServerConnection.c(ServerConnection.java:174) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:845) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
18.01 22:04:33 [Server] INFO Caused by: java.lang.NullPointerException
18.01 22:04:33 [Server] INFO at com.backpack.events.BackpackEvents.onPlayerQuit(BackpackEvents.java:33) ~[?:?]
18.01 22:04:33 [Server] INFO at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
18.01 22:04:33 [Server] INFO at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_121]
18.01 22:04:33 [Server] INFO at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]
18.01 22:04:33 [Server] INFO at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]
18.01 22:04:33 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot131.jar:git-Spigot-7754231-94b0980]
18.01 22:04:33 [Server] INFO ... 12 more