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Hello this is my first post,anyways, My server keeps crashing and I dont know why, It just started today and im clueless on what to do, Here is the crash report

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 11/27/16 12:26 PM
Description: Ticking entity

com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1
at com.google.gson.internal.Streams.parse(Streams.java:56)
at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:54)
at net.minecraft.util.JsonUtils.func_188173_a(SourceFile:501)
at net.minecraft.util.JsonUtils.func_188176_a(SourceFile:512)
at net.minecraft.util.text.ITextComponent$Serializer.func_150699_a(ITextComponent.java:260)
at net.minecraft.tileentity.TileEntitySign.func_145839_a(TileEntitySign.java:103)
at noppes.npcs.roles.JobBuilder.placeBlock(JobBuilder.java:154)
at noppes.npcs.roles.JobBuilder.aiUpdateTask(JobBuilder.java:118)
at noppes.npcs.ai.EntityAIJob.func_75246_d(EntityAIJob.java:35)
at net.minecraft.entity.ai.EntityAITasks.func_75774_a(SourceFile:129)
at net.minecraft.entity.EntityLiving.func_70626_be(EntityLiving.java:773)
at net.minecraft.entity.EntityLivingBase.func_70636_d(EntityLivingBase.java:2183)
at net.minecraft.entity.EntityLiving.func_70636_d(EntityLiving.java:577)
at noppes.npcs.entity.EntityNPCInterface.func_70636_d(EntityNPCInterface.java:389)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2013)
at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:295)
at noppes.npcs.entity.EntityNPCInterface.func_70071_h_(EntityNPCInterface.java:279)
at noppes.npcs.entity.EntityCustomNpc.func_70071_h_(EntityCustomNpc.java:35)
at net.minecraft.world.World.func_72866_a(World.java:1964)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:838)
at net.minecraft.world.World.func_72870_g(World.java:1934)
at net.minecraft.world.World.func_72939_s(World.java:1750)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:619)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:709)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Unknown Source)
Caused by: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1
at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1505)
at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1386)
at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:572)
at com.google.gson.stream.JsonReader.peek(JsonReader.java:414)
at com.google.gson.internal.Streams.parse(Streams.java:42)
... 27 more

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

-- Head --
Thread: Server thread
Stacktrace:
at com.google.gson.internal.Streams.parse(Streams.java:56)
at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:54)
at net.minecraft.util.JsonUtils.func_188173_a(SourceFile:501)
at net.minecraft.util.JsonUtils.func_188176_a(SourceFile:512)
at net.minecraft.util.text.ITextComponent$Serializer.func_150699_a(ITextComponent.java:260)
at net.minecraft.tileentity.TileEntitySign.func_145839_a(TileEntitySign.java:103)
at noppes.npcs.roles.JobBuilder.placeBlock(JobBuilder.java:154)
at noppes.npcs.roles.JobBuilder.aiUpdateTask(JobBuilder.java:118)
at noppes.npcs.ai.EntityAIJob.func_75246_d(EntityAIJob.java:35)
at net.minecraft.entity.ai.EntityAITasks.func_75774_a(SourceFile:129)
at net.minecraft.entity.EntityLiving.func_70626_be(EntityLiving.java:773)
at net.minecraft.entity.EntityLivingBase.func_70636_d(EntityLivingBase.java:2183)
at net.minecraft.entity.EntityLiving.func_70636_d(EntityLiving.java:577)
at noppes.npcs.entity.EntityNPCInterface.func_70636_d(EntityNPCInterface.java:389)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2013)
at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:295)
at noppes.npcs.entity.EntityNPCInterface.func_70071_h_(EntityNPCInterface.java:279)
at noppes.npcs.entity.EntityCustomNpc.func_70071_h_(EntityCustomNpc.java:35)
at net.minecraft.world.World.func_72866_a(World.java:1964)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:838)
at net.minecraft.world.World.func_72870_g(World.java:1934)

-- Entity being ticked --
Details:
Entity Type: customnpcs.CustomNpc (noppes.npcs.entity.EntityCustomNpc)
Entity ID: 68
Entity Name: Karla
Entity's Exact location: 18.70, 64.00, -219.50
Entity's Block location: World: (18,64,-220), Chunk: (at 2,4,4 in 1,-14; contains blocks 16,0,-224 to 31,255,-209), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Entity's Momentum: 0.00, -0.08, 0.00
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1750)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:619)

-- Affected level --
Details:
Level name: world
All players: 1 total; [EntityPlayerMP['Alucardpls'/98, l='world', x=-15.78, y=64.75, z=-279.33]]
Chunk stats: ServerChunkCache: 501 Drop: 0
Level seed: -8653582981963881942
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (-84,64,-208), Chunk: (at 12,4,0 in -6,-13; contains blocks -96,0,-208 to -81,255,-193), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 982338 game time, 2419 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:709)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.10.2
Operating System: Windows 10 (x86) version 10.0
Java Version: 1.8.0_101, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 91584000 bytes (87 MB) / 259522560 bytes (247 MB) up to 259522560 bytes (247 MB)
JVM Flags: 0 total;
IntCache: cache: 0, tcache: 5, allocated: 17, tallocated: 89
FML: MCP 9.32 Powered by Forge 12.18.2.2151 6 mods loaded, 6 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{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.10.2-12.18.2.2151-universal.jar)
UCHIJAAAA Forge{12.18.2.2151} [Minecraft Forge] (forge-1.10.2-12.18.2.2151-universal.jar)
UCHIJAAAA customnpcs{1.9.0_beta} [CustomNPCs] (CustomNPCs_1.10.2_beta(10oct16).jar)
UCHIJAAAA mercurius_updater{1.0} [mercurius_updater] (MercuriusUpdater-1.10.2.jar)
UCHIJAAAA worldedit{6.1.4} [WorldEdit] (worldedit-forge-mc1.10.2-6.1.4-dist.jar)
Loaded coremods (and transformers):
Profiler Position: N/A (disabled)
Player Count: 1 / 20; [EntityPlayerMP['[REDACTED]'/98, l='world', x=-15.78, y=64.75, z=-279.33]]
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)

What I can see is that an entity is causing this crash. Try to put the server into peaceful, than change it back.

Or its maybe because of your CustomNPCs mod. Try to take it out or reload it.