[17:50:20 WARN]: [Essentials] Plugin Essentials v2.0.1-b496 generated an exception while executing task 11
java.lang.NullPointerException: null
        at net.milkbowl.vault.permission.plugins.Permission_GroupManager.getPrimaryGroup(Permission_GroupManager.java:327) ~[?:?]
        at net.milkbowl.vault.permission.Permission.getPrimaryGroup(Permission.java:726) ~[?:?]
        at net.milkbowl.vault.permission.Permission.getPrimaryGroup(Permission.java:738) ~[?:?]
        at com.earth2me.essentials.perm.impl.AbstractVaultHandler.getGroup(AbstractVaultHandler.java:33) ~[?:?]
        at com.earth2me.essentials.perm.PermissionsHandler.getGroup(PermissionsHandler.java:28) ~[?:?]
        at com.earth2me.essentials.User.getGroup(User.java:624) ~[?:?]
        at com.earth2me.essentials.textreader.TextInput.<init>(TextInput.java:28) ~[?:?]
        at com.earth2me.essentials.EssentialsPlayerListener.delayedJoin(EssentialsPlayerListener.java:209) ~[?:?]
        at com.earth2me.essentials.EssentialsPlayerListener$1.run(EssentialsPlayerListener.java:179) ~[?:?]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-7228328-11323bf]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot.jar:git-Spigot-7228328-11323bf]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_91]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_91]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
[17:50:23 INFO]: Byte11 issued server command: /list