Version: 1.14.4 forge 28.1.40
No much details but the Deliveryman stops working for a while.

[09Okt2019 17:49:28.587] [Server thread/ERROR] [minecolonies/]: Pausing Entity Philibert U. Golding (com.minecolonies.coremod.job.Deliveryman) at BlockPos{x=72, y=70, z=3348} for 200 Seconds because of error: [09Okt2019 17:49:28.589] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: java.lang.NullPointerException [09Okt2019 17:49:28.589] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.crafting.ItemStorage.lambda$new$2(ItemStorage.java:87) [09Okt2019 17:49:28.590] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source) [09Okt2019 17:49:28.590] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.Collections$2.tryAdvance(Unknown Source) [09Okt2019 17:49:28.590] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.Collections$2.forEachRemaining(Unknown Source) [09Okt2019 17:49:28.591] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.copyInto(Unknown Source) [09Okt2019 17:49:28.591] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) [09Okt2019 17:49:28.591] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source) [09Okt2019 17:49:28.592] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.evaluate(Unknown Source) [09Okt2019 17:49:28.592] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ReferencePipeline.collect(Unknown Source) [09Okt2019 17:49:28.592] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.crafting.ItemStorage.<init>(ItemStorage.java:87) [09Okt2019 17:49:28.593] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.tileentities.TileEntityRack.hasItemStack(TileEntityRack.java:140) [09Okt2019 17:49:28.593] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.coremod.tileentities.TileEntityWareHouse.isInRack(TileEntityWareHouse.java:169) [09Okt2019 17:49:28.593] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.coremod.tileentities.TileEntityWareHouse.searchRightChestForStack(TileEntityWareHouse.java:149) [09Okt2019 17:49:28.594] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.coremod.tileentities.TileEntityWareHouse.dumpInventoryIntoWareHouse(TileEntityWareHouse.java:118) [09Okt2019 17:49:28.594] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.coremod.entity.ai.citizen.deliveryman.EntityAIWorkDeliveryman.dump(EntityAIWorkDeliveryman.java:421) [09Okt2019 17:49:28.594] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.entity.ai.statemachine.basestatemachine.BasicTransition.getNextState(BasicTransition.java:77) [09Okt2019 17:49:28.594] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.entity.ai.statemachine.basestatemachine.BasicStateMachine.transitionToNext(BasicStateMachine.java:148) [09Okt2019 17:49:28.594] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.entity.ai.statemachine.basestatemachine.BasicStateMachine.checkTransition(BasicStateMachine.java:131) [09Okt2019 17:49:28.595] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.entity.ai.statemachine.tickratestatemachine.TickRateStateMachine.checkTransition(TickRateStateMachine.java:78) [09Okt2019 17:49:28.595] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.MatchOps$1MatchSink.accept(Unknown Source) [09Okt2019 17:49:28.595] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.ArrayList$ArrayListSpliterator.tryAdvance(Unknown Source) [09Okt2019 17:49:28.596] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ReferencePipeline.forEachWithCancel(Unknown Source) [09Okt2019 17:49:28.596] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.copyIntoWithCancel(Unknown Source) [09Okt2019 17:49:28.596] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.copyInto(Unknown Source) [09Okt2019 17:49:28.596] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) [09Okt2019 17:49:28.597] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.MatchOps$MatchOp.evaluateSequential(Unknown Source) [09Okt2019 17:49:28.598] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.MatchOps$MatchOp.evaluateSequential(Unknown Source) [09Okt2019 17:49:28.599] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.evaluate(Unknown Source) [09Okt2019 17:49:28.599] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ReferencePipeline.anyMatch(Unknown Source) [09Okt2019 17:49:28.599] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.api.entity.ai.statemachine.tickratestatemachine.TickRateStateMachine.tick(TickRateStateMachine.java:60) [09Okt2019 17:49:28.600] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.coremod.entity.ai.basic.AbstractAISkeleton.func_75246_d(AbstractAISkeleton.java:151) [09Okt2019 17:49:28.600] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.ai.goal.PrioritizedGoal.func_75246_d(SourceFile:55) [09Okt2019 17:49:28.600] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source) [09Okt2019 17:49:28.600] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source) [09Okt2019 17:49:28.601] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.Iterator.forEachRemaining(Unknown Source) [09Okt2019 17:49:28.601] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source) [09Okt2019 17:49:28.601] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.copyInto(Unknown Source) [09Okt2019 17:49:28.602] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) [09Okt2019 17:49:28.602] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(Unknown Source) [09Okt2019 17:49:28.602] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(Unknown Source) [09Okt2019 17:49:28.603] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.AbstractPipeline.evaluate(Unknown Source) [09Okt2019 17:49:28.603] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.util.stream.ReferencePipeline.forEach(Unknown Source) [09Okt2019 17:49:28.603] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.ai.goal.GoalSelector.func_75774_a(SourceFile:80) [09Okt2019 17:49:28.604] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.MobEntity.func_70626_be(MobEntity.java:590) [09Okt2019 17:49:28.604] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.LivingEntity.func_70636_d(LivingEntity.java:2186) [09Okt2019 17:49:28.604] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.MobEntity.func_70636_d(MobEntity.java:460) [09Okt2019 17:49:28.605] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.AgeableEntity.func_70636_d(SourceFile:140) [09Okt2019 17:49:28.605] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at com.minecolonies.coremod.entity.citizen.EntityCitizen.func_70636_d(EntityCitizen.java:1071) [09Okt2019 17:49:28.605] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.LivingEntity.func_70071_h_(LivingEntity.java:2032) [09Okt2019 17:49:28.605] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.entity.MobEntity.func_70071_h_(MobEntity.java:274) [09Okt2019 17:49:28.606] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.world.server.ServerWorld.func_217479_a(ServerWorld.java:587) [09Okt2019 17:49:28.606] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.world.World.func_217390_a(World.java:684) [09Okt2019 17:49:28.606] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.world.server.ServerWorld.func_72835_b(ServerWorld.java:394) [09Okt2019 17:49:28.607] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:829) [09Okt2019 17:49:28.608] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:324) [09Okt2019 17:49:28.609] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:764) [09Okt2019 17:49:28.609] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:622) [09Okt2019 17:49:28.609] [Server thread/INFO] [STDERR/]: [com.minecolonies.coremod.entity.ai.basic.AbstractEntityAIBasic:onException:334]: at java.lang.Thread.run(Unknown Source) [09Okt2019 17:49:38.633] [Server thread/WARN] [minecolonies/]: Statemachine for transition com.minecolonies.api.entity.ai.statemachine.AITarget@7359e28 threw an exception: java.lang.NullPointerException: null at com.minecolonies.api.crafting.ItemStorage.lambda$new$2(ItemStorage.java:87) ~[?:0.10.424-ALPHA] at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source) ~[?:1.8.0_221] at java.util.Collections$2.tryAdvance(Unknown Source) ~[?:1.8.0_221] at java.util.Collections$2.forEachRemaining(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.copyInto(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.evaluate(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ReferencePipeline.collect(Unknown Source) ~[?:1.8.0_221] at com.minecolonies.api.crafting.ItemStorage.<init>(ItemStorage.java:87) ~[?:0.10.424-ALPHA] at com.minecolonies.api.tileentities.TileEntityRack.hasItemStack(TileEntityRack.java:140) ~[?:0.10.424-ALPHA] at com.minecolonies.coremod.tileentities.TileEntityWareHouse.isInRack(TileEntityWareHouse.java:169) ~[?:0.10.424-ALPHA] at com.minecolonies.coremod.tileentities.TileEntityWareHouse.searchRightChestForStack(TileEntityWareHouse.java:149) ~[?:0.10.424-ALPHA] at com.minecolonies.coremod.tileentities.TileEntityWareHouse.dumpInventoryIntoWareHouse(TileEntityWareHouse.java:118) ~[?:0.10.424-ALPHA] at com.minecolonies.coremod.entity.ai.citizen.deliveryman.EntityAIWorkDeliveryman.dump(EntityAIWorkDeliveryman.java:421) ~[?:0.10.424-ALPHA] at com.minecolonies.api.entity.ai.statemachine.basestatemachine.BasicTransition.getNextState(BasicTransition.java:77) ~[?:0.10.424-ALPHA] at com.minecolonies.api.entity.ai.statemachine.basestatemachine.BasicStateMachine.transitionToNext(BasicStateMachine.java:148) ~[?:0.10.424-ALPHA] at com.minecolonies.api.entity.ai.statemachine.basestatemachine.BasicStateMachine.checkTransition(BasicStateMachine.java:131) ~[?:0.10.424-ALPHA] at com.minecolonies.api.entity.ai.statemachine.tickratestatemachine.TickRateStateMachine.checkTransition(TickRateStateMachine.java:78) ~[?:0.10.424-ALPHA] at java.util.stream.MatchOps$1MatchSink.accept(Unknown Source) ~[?:1.8.0_221] at java.util.ArrayList$ArrayListSpliterator.tryAdvance(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ReferencePipeline.forEachWithCancel(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.copyIntoWithCancel(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.copyInto(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) ~[?:1.8.0_221] at java.util.stream.MatchOps$MatchOp.evaluateSequential(Unknown Source) ~[?:1.8.0_221] at java.util.stream.MatchOps$MatchOp.evaluateSequential(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.evaluate(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ReferencePipeline.anyMatch(Unknown Source) ~[?:1.8.0_221] at com.minecolonies.api.entity.ai.statemachine.tickratestatemachine.TickRateStateMachine.tick(TickRateStateMachine.java:60) ~[?:0.10.424-ALPHA] at com.minecolonies.coremod.entity.ai.basic.AbstractAISkeleton.func_75246_d(AbstractAISkeleton.java:151) ~[?:0.10.424-ALPHA] at net.minecraft.entity.ai.goal.PrioritizedGoal.func_75246_d(SourceFile:55) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source) ~[?:1.8.0_221] at java.util.Iterator.forEachRemaining(Unknown Source) ~[?:1.8.0_221] at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.copyInto(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(Unknown Source) ~[?:1.8.0_221] at java.util.stream.AbstractPipeline.evaluate(Unknown Source) ~[?:1.8.0_221] at java.util.stream.ReferencePipeline.forEach(Unknown Source) ~[?:1.8.0_221] at net.minecraft.entity.ai.goal.GoalSelector.func_75774_a(SourceFile:80) ~[?:?] at net.minecraft.entity.MobEntity.func_70626_be(MobEntity.java:590) ~[?:?] at net.minecraft.entity.LivingEntity.func_70636_d(LivingEntity.java:2186) ~[?:?] at net.minecraft.entity.MobEntity.func_70636_d(MobEntity.java:460) ~[?:?] at net.minecraft.entity.AgeableEntity.func_70636_d(SourceFile:140) ~[?:?] at com.minecolonies.coremod.entity.citizen.EntityCitizen.func_70636_d(EntityCitizen.java:1071) ~[?:0.10.424-ALPHA] at net.minecraft.entity.LivingEntity.func_70071_h_(LivingEntity.java:2032) ~[?:?] at net.minecraft.entity.MobEntity.func_70071_h_(MobEntity.java:274) ~[?:?] at net.minecraft.world.server.ServerWorld.func_217479_a(ServerWorld.java:587) ~[?:?] at net.minecraft.world.World.func_217390_a(World.java:684) [?:?] at net.minecraft.world.server.ServerWorld.func_72835_b(ServerWorld.java:394) [?:?] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:829) [?:?] at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:324) [?:?] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:764) [?:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:622) [?:?] at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]

1. Install newest Minecolonies + Structurize
2. Build some building and a Dilveryman
3. Deliveryman spamming errors and stop working for some times.
4. ... Profit