[11:19:40] [Server thread/WARN] [minecolonies/]: Action for target com.minecolonies.entity.ai.util.AITarget@52fe60a6 threw an exception:
java.lang.NullPointerException
    at com.minecolonies.entity.ai.citizen.lumberjack.Tree.addAndSearch(Tree.java:340) ~[Tree.class:?]
    at com.minecolonies.entity.ai.citizen.lumberjack.Tree.<init>(Tree.java:125) ~[Tree.class:?]
    at com.minecolonies.entity.ai.citizen.lumberjack.EntityAIWorkLumberjack.setNewTree(EntityAIWorkLumberjack.java:274) ~[EntityAIWorkLumberjack.class:?]
    at com.minecolonies.entity.ai.citizen.lumberjack.EntityAIWorkLumberjack.findTree(EntityAIWorkLumberjack.java:260) ~[EntityAIWorkLumberjack.class:?]
    at com.minecolonies.entity.ai.citizen.lumberjack.EntityAIWorkLumberjack.findTrees(EntityAIWorkLumberjack.java:241) ~[EntityAIWorkLumberjack.class:?]
    at com.minecolonies.entity.ai.util.AITarget.apply(AITarget.java:125) ~[AITarget.class:?]
    at com.minecolonies.entity.ai.basic.AbstractAISkeleton.applyTarget(AbstractAISkeleton.java:192) ~[AbstractAISkeleton.class:?]
    at com.minecolonies.entity.ai.basic.AbstractAISkeleton.checkOnTarget(AbstractAISkeleton.java:175) ~[AbstractAISkeleton.class:?]
    at java.util.stream.MatchOps$1MatchSink.accept(MatchOps.java:90) [?:1.8.0_101]
    at java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1351) [?:1.8.0_101]
    at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126) [?:1.8.0_101]
    at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:498) [?:1.8.0_101]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485) [?:1.8.0_101]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) [?:1.8.0_101]
    at java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:230) [?:1.8.0_101]
    at java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:196) [?:1.8.0_101]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) [?:1.8.0_101]
    at java.util.stream.ReferencePipeline.anyMatch(ReferencePipeline.java:449) [?:1.8.0_101]
    at com.minecolonies.entity.ai.basic.AbstractAISkeleton.func_75246_d(AbstractAISkeleton.java:129) [AbstractAISkeleton.class:?]
    at net.minecraft.entity.ai.EntityAITasks.func_75774_a(SourceFile:129) [tr.class:?]
    at net.minecraft.entity.EntityLiving.func_70626_be(EntityLiving.java:773) [sg.class:?]
    at net.minecraft.entity.EntityLivingBase.func_70636_d(EntityLivingBase.java:2189) [sf.class:?]
    at net.minecraft.entity.EntityLiving.func_70636_d(EntityLiving.java:577) [sg.class:?]
    at net.minecraft.entity.EntityAgeable.func_70636_d(EntityAgeable.java:155) [rt.class:?]
    at com.minecolonies.entity.EntityCitizen.func_70636_d(EntityCitizen.java:636) [EntityCitizen.class:?]
    at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2019) [sf.class:?]
    at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:295) [sg.class:?]
    at org.spongepowered.common.event.tracking.TrackingUtil.tickEntity(TrackingUtil.java:143) [TrackingUtil.class:1.10.2-2092-5.0.0-BETA-1753]
    at net.minecraft.world.WorldServer.redirect$onCallEntityUpdate$0(WorldServer.java:1297) [ls.class:?]
    at net.minecraft.world.World.func_72866_a(World.java:1964) [aid.class:?]
    at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:838) [ls.class:?]
    at net.minecraft.world.World.func_72870_g(World.java:1934) [aid.class:?]
    at net.minecraft.world.World.func_72939_s(World.java:1217) [aid.class:?]
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:704) [ls.class:?]
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:709) [MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]