java.lang.NullPointerException: This exception has no message.

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at com.dsh105.echopet.compat.nms.v1_10_R1.entity.EntityPet.onLive(
at com.dsh105.echopet.compat.nms.v1_10_R1.entity.EntityPet.m(
at com.dsh105.echopet.compat.nms.v1_10_R1.entity.EntityAgeablePet.m(
at net.minecraft.server.v1_10_R1.World.entityJoinedWorld(
at net.minecraft.server.v1_10_R1.World.g(
at net.minecraft.server.v1_10_R1.World.tickEntities(
at net.minecraft.server.v1_10_R1.WorldServer.tickEntities(
at net.minecraft.server.v1_10_R1.MinecraftServer.D(
at net.minecraft.server.v1_10_R1.DedicatedServer.D(
at net.minecraft.server.v1_10_R1.MinecraftServer.C(

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