[04:49:06 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'plugman' in plugin PlugMan v2.1.5
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[patched_1.13.2.jar:git-Paper-470]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[patched_1.13.2.jar:git-Paper-470]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchCommand(CraftServer.java:732) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.PlayerConnection.handleCommand(PlayerConnection.java:1799) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:1602) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:12) ~[patched_1.13.2.jar:git-Paper-470]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_191]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_191]
        at net.minecraft.server.v1_13_R2.SystemUtils.a(SystemUtils.java:109) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:1016) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:439) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:943) ~[patched_1.13.2.jar:git-Paper-470]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:841) ~[patched_1.13.2.jar:git-Paper-470]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]
Caused by: java.lang.IllegalStateException: New flags cannot be registered at this time
        at com.sk89q.worldguard.protection.flags.registry.SimpleFlagRegistry.register(SimpleFlagRegistry.java:61) ~[?:?]
        at uk.antiperson.stackmob.compat.hooks.WorldGuardCompat.registerFlag(WorldGuardCompat.java:24) ~[?:?]
        at uk.antiperson.stackmob.compat.hooks.WorldGuardHook.onLoad(WorldGuardHook.java:23) ~[?:?]
        at uk.antiperson.stackmob.compat.HookManager.onServerLoad(HookManager.java:19) ~[?:?]
        at uk.antiperson.stackmob.StackMob.onLoad(StackMob.java:59) ~[?:?]
        at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:365) ~[?:?]
        at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:318) ~[?:?]
        at com.rylinaux.plugman.util.PluginUtil.reload(PluginUtil.java:380) ~[?:?]
        at com.rylinaux.plugman.command.ReloadCommand.execute(ReloadCommand.java:122) ~[?:?]
        at com.rylinaux.plugman.PlugManCommandHandler.onCommand(PlugManCommandHandler.java:95) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[patched_1.13.2.jar:git-Paper-470]
        ... 15 more