net.minecraft.util.ReportedException: Ticking entity
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:846) ~[MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:741) ~[MinecraftServer.class:?]
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192) ~[IntegratedServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:590) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]
Caused by: java.lang.NullPointerException
at net.minecraft.entity.monster.EntitySnowman.onLivingUpdate(EntitySnowman.java:112) ~[EntitySnowman.class:?]
at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2396) ~[EntityLivingBase.class:?]
at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:346) ~[EntityLiving.class:?]
at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2168) ~[World.class:?]
at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:871) ~[WorldServer.class:?]
at net.minecraft.world.World.updateEntity(World.java:2127) ~[World.class:?]
at net.minecraft.world.World.updateEntities(World.java:1928) ~[World.class:?]
at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:643) ~[WorldServer.class:?]
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:840) ~[MinecraftServer.class:?]
... 4 more
[10:53:04] [Server thread/ERROR] [net.minecraft.server.MinecraftServer]: This crash report has been saved to: C:\Users\BlackHawk\Desktop\Java Projects\Dimensional Pockets II\Latest Oxygen [1.12.2]\run.\crash-reports\crash-2018-08-11_10.53.04-server.txt
[10:53:04] [Server thread/INFO] [net.minecraft.server.MinecraftServer]: Stopping server
[10:53:04] [Server thread/INFO] [net.minecraft.server.MinecraftServer]: Saving players
[10:53:04] [main/INFO] [STDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:629]: ---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 8/11/18 10:53 AM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at net.minecraft.entity.monster.EntitySnowman.onLivingUpdate(EntitySnowman.java:112)
at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2396)
at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:346)
at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2168)
at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:871)
at net.minecraft.world.World.updateEntity(World.java:2127)
at net.minecraft.world.World.updateEntities(World.java:1928)
at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:643)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:840)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:741)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:590)
at java.lang.Thread.run(Thread.java:748)

Bug fixed. Biome wasn't registered properly and so the biome didn't have a temperature value. Snowmen now work inside the biome. TheRealZeher.