Problem

My server crashes with this plugin, I'm using permissionEx and the animated tablist last version.

[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: Current Thread: Server thread
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: PID: 15 | Suspended: false | Native: false | State: BLOCKED
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: Stack:
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: java.util.Collections$SynchronizedCollection.remove(Collections.java:2040)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.Groups.removePlayerGroup(Groups.java:205)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.TabList.onPlayerQuit(TabList.java:366)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.listeners.Listeners.onPlayerLeave(Listeners.java:66)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: sun.reflect.GeneratedMethodAccessor191.invoke(Unknown Source)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: java.lang.reflect.Method.invoke(Method.java:498)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:517)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:502)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.PlayerList.disconnect(PlayerList.java:364)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:875)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.NetworkManager.l(NetworkManager.java:314)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:145)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:875)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: java.lang.Thread.run(Thread.java:748)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: ------------------------------
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: Entire Thread Dump:
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: ------------------------------
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: Current Thread: Craft Scheduler Thread - 1090
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: PID: 6937 | Suspended: false | Native: false | State: BLOCKED
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: Thread is waiting on monitor(s):
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: Locked on:hu.montlikadani.tablist.bukkit.Groups.updatePlayers(Groups.java:269)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: Stack:
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.bukkit.plugin.SimplePluginManager.getPlugin(SimplePluginManager.java:363)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.TabList.isPluginEnabled(TabList.java:484)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.utils.Variables.setPlaceholders(Variables.java:195)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.utils.Variables.replaceVariables(Variables.java:125)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.TabListPlayer.getSuffix(TabListPlayer.java:235)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.tablist.groups.ReflectionHandled.setTeam(ReflectionHandled.java:89)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.Groups.setPlayerTeam(Groups.java:156)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.Groups.updatePlayers(Groups.java:269)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.Groups.lambda$2(Groups.java:244)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: hu.montlikadani.tablist.bukkit.Groups$$Lambda$383/875761634.run(Unknown Source)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: org.github.paperspigot.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:23)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[12:33:01] [PaperSpigot Watchdog Thread/ERROR]: java.lang.Thread.run(Thread.java:748)

You still using old version of tablist.