[02:09:18] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to PlotSquared v3.2.0
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:298) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:157) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:144) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:54) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:231) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:148) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:872) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:711) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:614) [creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
Caused by: java.lang.NullPointerException
    at com.intellectualcrafters.plot.util.MainUtil.getConnectedPlots(MainUtil.java:2153) ~[?:?]
    at com.intellectualcrafters.plot.object.PlotHandler.isOwner(PlotHandler.java:45) ~[?:?]
    at com.intellectualcrafters.plot.PS.getPlots(PS.java:1154) ~[?:?]
    at com.intellectualcrafters.plot.util.UUIDHandlerImplementation.add(UUIDHandlerImplementation.java:119) ~[?:?]
    at com.intellectualcrafters.plot.util.UUIDHandler.add(UUIDHandler.java:21) ~[?:?]
    at com.plotsquared.bukkit.listeners.PlayerEvents.onJoin(PlayerEvents.java:452) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_60]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[creative.jar:git-PaperSpigot-502ffa0-2d4f577]
    ... 14 more