NullPointerException in timer of Essentials

[ghost]

Bug on essentials, spam error:

23:49:32 [CRITICAL] Exception while invoking run
java.lang.NullPointerException
at com.earth2me.essentials.EssentialsTimer.run(EssentialsTimer.java:99)
at cn.nukkit.scheduler.TaskHandler.run(TaskHandler.java:99)
at cn.nukkit.scheduler.ServerScheduler.mainThreadHeartbeat(ServerScheduler.java:282)
at cn.nukkit.Server.tick(Server.java:1005)
at cn.nukkit.Server.tickProcessor(Server.java:800)
at cn.nukkit.Server.start(Server.java:779)
at cn.nukkit.Server.(Server.java:464)
at cn.nukkit.Nukkit.main(Nukkit.java:68)

[MrPowerGamerBR]

As a reference:

if (user.getLastOnlineActivity() < currentTime && user.getLastOnlineActivity() > user.getLastLogout())

This line is throwing NPE with Pokkit