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So I have been playing in Minecraft for a while now, and I have been wanting to have my own kingdom, but building one takes too much time. I decided to install a couple maps, including the Kingdom of Verona map, but when I open the world, Minecraft crashes. Sometimes they don't even show up in my singleplayer worlds so I will take the internal folders and move them to the saves part. I know I must be doing something wrong, so here is my crash report:

--- Minecraft Crash Report ----

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

// Surprise! Haha. Well, this is awkward.

Time: 9/27/15 11:29 AM
Description: Exception in server tick loop

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)
at java.util.HashMap$KeyIterator.next(HashMap.java:1453)
at com.google.common.collect.AbstractMapBasedMultimap$WrappedCollection$WrappedIterator.next(AbstractMapBasedMultimap.java:486)
at net.minecraft.util.ClassInheritanceMultiMap$2.computeNext(SourceFile:90)
at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
at net.minecraft.world.World.func_175650_b(World.java:3126)
at net.minecraft.world.chunk.Chunk.func_76631_c(Chunk.java:952)
at net.minecraftforge.common.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:46)
at net.minecraftforge.common.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:12)
at net.minecraftforge.common.util.AsynchronousExecutor.skipQueue(AsynchronousExecutor.java:344)
at net.minecraftforge.common.util.AsynchronousExecutor.getSkipQueue(AsynchronousExecutor.java:302)
at net.minecraftforge.common.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:12)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:117)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:92)
at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:302)
at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:112)
at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:126)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)
at java.lang.Thread.run(Thread.java:745)

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

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 234973096 bytes (224 MB) / 610246656 bytes (581 MB) up to 2134114304 bytes (2035 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 15, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.3.1514 24 mods loaded, 24 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.3.1514.jar)
UCHIJAA Forge{11.14.3.1514} [Minecraft Forge] (forge-1.8-11.14.3.1514.jar)
UCHIJAA TooManyItems{1.8} [TooManyItems] (minecraft.jar)
UCHIJAA securitycraft{v1.7.4.1} [SecurityCraft] ([1.8] SecurityCraft v1.7.4.1.jar)
UCHIJAA bspkrsCore{7.01} [bspkrsCore] ([1.8]bspkrsCore-universal-7.01.jar)
UCHIJAA BiomesOPlenty{1.0} [Biomes O' Plenty] (_BiomesOPlenty-1.8-3.0.0.1017-universal.jar)
UCHIJAA CustomSpawner{3.4.0} [DrZhark's CustomSpawner] (CustomMobSpawner 3.4.0.jar)
UCHIJAA DamageIndicatorsMod{3.3.2} [Damage Indicators] (Damage-Indicators-Mod-1.8.jar)
UCHIJAA MoCreatures{8.0.0.devA} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod-8.0.0.devA.jar)
UCHIJAA iChunUtil{5.0.0} [iChunUtil] (iChunUtil-5.0.0.jar)
UCHIJAA RadixCore{2.0.3-1.8} [RadixCore] (RadixCore-2.0.3-1.8-universal.jar)
UCHIJAA MCA{5.0.6.1-1.8} [Minecraft Comes Alive] (MCA-5.0.6.2-1.8-universal.jar)
UCHIJAA MobAmputation{5.0.0} [MobAmputation] (Mob-Amputation-Mod-1.8.jar)
UCHIJAA cfm{3.4.8} [§9MrCrayfish's Furniture Mod] (MrCrayfishFurnitureModv3.4.8-build1(1.8).jar)
UCHIJAA parachutemod{3.1.1} [Parachute Mod] (parachutemod-1.8.0-3.1.2-96.jar)
UCHIJAA ragdollCorpses{0.12} [Ragdoll Corpses] (Ragdoll-Corpses-Mod-1.8.jar)
UCHIJAA Roguelike{1.3.6} [Roguelike Dungeons] (RoguelikeDungeons-1.8-1.3.6.jar)
UCHIJAA AS_Ruins{14.8} [Ruins Spawning System] (Ruins-1.8.jar)
UCHIJAA Scenter{1.8-3.3.0} [Scenter] (Scenter-Mod-1.8.jar)
UCHIJAA shipwrecks_winslow{1.6.3} [Shipwrecks!] (Shipwrecks-Mod-1.8.jar)
UCHIJAA Treecapitator{1.8} [Treecapitator] (Tree-Capitator-Mod-1.8.jar)
UCHIJAA worldtools{1.1.1} [World Tools] (WorldTools_1.8_1.1.1.jar)
UCHIJAA ZombieInfection{2.3.0} [Zombie Infection] (Zombie Infection-1.8-2.3.0.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'