shopkeeper

[Server thread/ERROR]: Could not pass event EntityPotionEffectEvent to Shopkeepers v2.6.0
org.bukkit.event.EventException: null
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:316) ~[spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:66) ~[spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at org.bukkit.craftbukkit.v1_13_R2.event.CraftEventFactory.callEntityPotionEffectChangeEvent(CraftEventFactory.java:1280) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at org.bukkit.craftbukkit.v1_13_R2.event.CraftEventFactory.callEntityPotionEffectChangeEvent(CraftEventFactory.java:1268) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at net.minecraft.server.v1_13_R2.EntityLiving.addEffect(EntityLiving.java:755) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at org.bukkit.craftbukkit.v1_13_R2.entity.CraftLivingEntity.addPotionEffect(CraftLivingEntity.java:289) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at com.sucy.skill.dynamic.mechanic.PotionMechanic.execute(PotionMechanic.java:73) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.EffectComponent.executeChildren(EffectComponent.java:212) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.target.TargetComponent.execute(TargetComponent.java:55) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.EffectComponent.executeChildren(EffectComponent.java:212) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.condition.ConditionComponent.execute(ConditionComponent.java:31) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.EffectComponent.executeChildren(EffectComponent.java:212) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.condition.ConditionComponent.execute(ConditionComponent.java:31) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.EffectComponent.executeChildren(EffectComponent.java:212) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.condition.ConditionComponent.execute(ConditionComponent.java:31) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.EffectComponent.executeChildren(EffectComponent.java:212) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.mechanic.PassiveMechanic.access$400(PassiveMechanic.java:43) [SkillAPI.jar:?]
    at com.sucy.skill.dynamic.mechanic.PassiveMechanic$PassiveTask.run(PassiveMechanic.java:121) [SkillAPI.jar:?]
    at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftTask.run(CraftTask.java:81) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:392) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:889) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:831) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:729) [spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.lang.NullPointerException
    at com.nisovin.shopkeepers.shopobjects.citizens.CitizensShops.getNPCUniqueId(CitizensShops.java:149) ~[?:?]
    at com.nisovin.shopkeepers.shopobjects.citizens.SKCitizensShopObjectType.createObjectId(SKCitizensShopObjectType.java:31) ~[?:?]
    at com.nisovin.shopkeepers.shopkeeper.SKShopkeeperRegistry.getShopkeeperByEntity(SKShopkeeperRegistry.java:621) ~[?:?]
    at com.nisovin.shopkeepers.shopkeeper.SKShopkeeperRegistry.isShopkeeper(SKShopkeeperRegistry.java:631) ~[?:?]
    at com.nisovin.shopkeepers.shopobjects.living.LivingEntityShopListener.onEntityPotionEffectEvent(LivingEntityShopListener.java:271) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_131]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_131]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:312) ~[spigot-1.13.2.jar:git-Spigot-e6eb36f-d65a257]
    ... 26 more