[16:38:00 INFO]: [Citizens] Exception while updating 152: null.
[16:38:00 WARN]: java.lang.NullPointerException
[16:38:00 WARN]:        at net.citizensnpcs.npc.ai.CitizensNavigator.stopNavigat
ing(CitizensNavigator.java:233)
[16:38:00 WARN]:        at net.citizensnpcs.npc.ai.CitizensNavigator.run(Citizen
sNavigator.java:138)
[16:38:00 WARN]:        at net.citizensnpcs.npc.CitizensNPC.update(CitizensNPC.j
ava:229)
[16:38:00 WARN]:        at net.citizensnpcs.npc.entity.EntityHumanNPC.h(EntityHu
manNPC.java:176)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.World.entityJoinedWorld(
World.java:1620)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.World.playerJoinedWorld(
World.java:1595)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.World.tickEntities(World
.java:1460)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.WorldServer.tickEntities
(WorldServer.java:516)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.v(Minecr
aftServer.java:706)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.DedicatedServer.v(Dedica
tedServer.java:289)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.u(Minecr
aftServer.java:584)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.run(Mine
craftServer.java:490)
[16:38:00 WARN]:        at net.minecraft.server.v1_7_R4.ThreadServerApplication.
run(SourceFile:628)