error in my server minecraft bukkit 1.14.3

this appear:


[12:59:20] [Server thread/WARN]: [Essentials] Task #6750 for Essentials v2.17.1.0 generated an exception
java.lang.NullPointerException: null
at com.earth2me.essentials.xmpp.XMPPManager.updatePresence(XMPPManager.java:142) ~[?:?]
at com.earth2me.essentials.xmpp.EssentialsXMPP.updatePresence(EssentialsXMPP.java:113) ~[?:?]
at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftTask.run(CraftTask.java:77) ~[server.jar:git-Bukkit-f1f3355]
at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:393) [server.jar:git-Bukkit-f1f3355]
at net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:956) [server.jar:git-Bukkit-f1f3355]
at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:370) [server.jar:git-Bukkit-f1f3355]
at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:911) [server.jar:git-Bukkit-f1f3355]
at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:765) [server.jar:git-Bukkit-f1f3355]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]

i dont know what is, my server is up but sometimes crashed for 1 sec please help i am new on this about creating server