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Here is the crash log:

---- Minecraft Crash Report ----

WARNING: coremods are present:
TMIForgeLoader (TooManyItems2015_02_14_1.8_Forge.jar)
Contact their authors BEFORE contacting forge

// I bet Cylons wouldn't have this problem.

Time: 5/25/16 4:24 PM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at mapwriter.forge.EventHandler.eventPlayerDeath(EventHandler.java:70)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_38_EventHandler_eventPlayerDeath_LivingDeathEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraftforge.common.ForgeHooks.onLivingDeath(ForgeHooks.java:351)
at net.minecraft.entity.EntityLivingBase.func_70645_a(EntityLivingBase.java:900)
at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:863)
at net.minecraft.entity.passive.EntityAnimal.func_70097_a(SourceFile:61)
at net.minecraft.entity.projectile.EntityWitherSkull.func_70227_a(SourceFile:62)
at net.minecraft.entity.projectile.EntityFireball.func_70071_h_(SourceFile:148)
at net.minecraft.world.World.func_72866_a(World.java:1880)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:732)
at net.minecraft.world.World.func_72870_g(World.java:1850)
at net.minecraft.world.World.func_72939_s(World.java:1679)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:571)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:704)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:598)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:164)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:478)
at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at mapwriter.forge.EventHandler.eventPlayerDeath(EventHandler.java:70)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_38_EventHandler_eventPlayerDeath_LivingDeathEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraftforge.common.ForgeHooks.onLivingDeath(ForgeHooks.java:351)
at net.minecraft.entity.EntityLivingBase.func_70645_a(EntityLivingBase.java:900)
at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:863)
at net.minecraft.entity.passive.EntityAnimal.func_70097_a(SourceFile:61)
at net.minecraft.entity.projectile.EntityWitherSkull.func_70227_a(SourceFile:62)
at net.minecraft.entity.projectile.EntityFireball.func_70071_h_(SourceFile:148)
at net.minecraft.world.World.func_72866_a(World.java:1880)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:732)
at net.minecraft.world.World.func_72870_g(World.java:1850)

-- Entity being ticked --
Details:
Entity Type: WitherSkull (net.minecraft.entity.projectile.EntityWitherSkull)
Entity ID: 566
Entity Name: entity.WitherSkull.name
Entity's Exact location: -81.93, 93.53, -18.86
Entity's Block location: -82.00,93.00,-19.00 - World: (-82,93,-19), Chunk: (at 14,5,13 in -6,-2; contains blocks -96,0,-32 to -81,255,-17), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Entity's Momentum: -0.87, -0.71, 0.47
Entity's Rider: ~~ERROR~~ NullPointerException: null
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1679)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:571)

-- Affected level --
Details:
Level name: Stronghold Home (1.8 Forge)
All players: 0 total; []
Chunk stats: ServerChunkCache: 628 Drop: 0
Level seed: 1589446087017838592
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: 0.00,65.00,0.00 - World: (0,65,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 1335902 game time, 119718 day time
Level dimension: 1
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 100473 (now: false), thunder time: 24455 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:704)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:598)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:164)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:478)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 500132440 bytes (476 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.4.1577 17 mods loaded, 17 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.4.1577.jar)
UCHIJAAAA Forge{11.14.4.1577} [Minecraft Forge] (forge-1.8-11.14.4.1577.jar)
UCHIJAAAA TooManyItems{1.8} [TooManyItems] (minecraft.jar)
UCHIJAAAA basemetals{1.5.0} [Base Metals] (BaseMetals-1.5.0.jar)
UCHIJAAAA doge{0.5.3} [Doge] (DogeMod-[1.8]-0.5.3.jar)
UCHIJAAAA ECCMinimap{2.2.5} [ECCMinimap] (ECCMinimap-1.8-2.2.5.jar)
UCHIJAAAA poweradvantage{1.3.5} [Power Advantage] (PowerAdvantage-1.3.5.jar)
UCHIJAAAA electricadvantage{1.0.4} [Electric Advantage] (ElectricAdvantage-1.0.4.jar)
UCHIJAAAA flansmod{5.1} [Flan's Mod] (Flan's Mod-1.8-5.1.jar)
UCHIJAAAA MemoryCleaner{1.0} [Memory Cleaner] (MemoryCleaner-1.4-mc.1.8.jar)
UCHIJAAAA cfm{3.5.2} [§9MrCrayfish's Furniture Mod] (MrCrayfishFurnitureModv3.5.2(1.8).jar)
UCHIJAAAA ckm{1.0} [MrCrayfish's Key Mod] (MrCrayfishKeyModv1.1(1.8).jar)
UCHIJAAAA steamadvantage{1.4.0} [Steam Advantage] (SteamAdvantage-1.4.0.jar)
UCHIJAAAA reinforcedmod{Updated for 1.8} [Reinforced Mod] (The Reinforced Mod 1.8(v1.4.0).jar)
UCHIJAAAA youtubers{1.8.0} [Youtubers+ Mod] (youtubers-1.8.0-MC1.8.jar)
UCHIJAAAA zyinhud{1.4.1} [Zyin's HUD] (ZyinsHUD-(1.8)-v.1.4.1.jar)
Loaded coremods (and transformers):
TMIForgeLoader (TooManyItems2015_02_14_1.8_Forge.jar)
TMIForgeTransformer
GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
Profiler Position: N/A (disabled)
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

Does anyone have ideas about this issue?

Quote from grimallq»

What is Mapwriter code doing here when you don't have Mapwriter installed? Someone's been cribbing off open source?

*looks closely at ECC Minimap*

Yup. Another Mapwriter fork.

I downloaded the Ecocitycraft*-themed Minimap mod from the official Ecocitycraft site.

*Ecocitycraft is the Minecraft server (mc.ecocitycraft.com)