Just downloaded the mod today, Im using forge 1.8-Forge11.14.3.1450, The only other mod I have installed is optifine, I have tried to play without it. I use the crystal ball to spawn a village, and when it gets close to night, the game crashes. If I try and load the map up, it crashes.
Here is the crash report I get.

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// On the bright side, I bought you a teddy bear!

Time: 8/23/15 3:08 AM
Description: Ticking entity

java.lang.IllegalArgumentException: Cannot get property PropertyEnum{name=part, clazz=class net.minecraft.block.BlockBed$EnumPartType, values=[head, foot]} as it does not exist in BlockState{block=minecraft:cobblestone, properties=[]}
at net.minecraft.block.state.BlockState$StateImplementation.func_177229_b(BlockState.java:158)
at mca.ai.AISleep.trySleepInBed(AISleep.java:354)
at mca.ai.AISleep.onUpdateServer(AISleep.java:90)
at mca.ai.AIManager.onUpdate(AIManager.java:45)
at mca.entity.EntityHuman.func_70071_h_(EntityHuman.java:308)
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:258)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:478)
at java.lang.Thread.run(Unknown Source)

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

-- Head --
Stacktrace:
at net.minecraft.block.state.BlockState$StateImplementation.func_177229_b(BlockState.java:158)
at mca.ai.AISleep.trySleepInBed(AISleep.java:354)
at mca.ai.AISleep.onUpdateServer(AISleep.java:90)
at mca.ai.AIManager.onUpdate(AIManager.java:45)
at mca.entity.EntityHuman.func_70071_h_(EntityHuman.java:308)
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: MCA.EntityHuman (mca.entity.EntityHuman)
Entity ID: 200
Entity Name: Trent
Entity's Exact location: -238.00, 70.00, 387.00
Entity's Block location: -238.00,70.00,387.00 - World: (-238,70,387), Chunk: (at 2,4,3 in -15,24; contains blocks -240,0,384 to -225,255,399), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Entity's Momentum: 0.00, -0.08, 0.00
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: Minecraft Alive
All players: 0 total; []
Chunk stats: ServerChunkCache: 625 Drop: 0
Level seed: 1368767265
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: -256.00,64.00,256.00 - World: (-256,64,256), Chunk: (at 0,4,0 in -16,16; contains blocks -256,0,256 to -241,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 12547 game time, 12547 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 37915 (now: false), thunder time: 113481 (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:704)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:598)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:258)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:478)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 141271024 bytes (134 MB) / 358920192 bytes (342 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 11.14.3.1450 Optifine OptiFine_1.8_HD_U_D5 5 mods loaded, 5 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
UCHIJAAAA FML{8.0.99.99} Forge Mod Loader
UCHIJAAAA Forge{11.14.3.1450} Minecraft Forge
UCHIJAAAA RadixCore{1.8-2.0.4} RadixCore
UCHIJAAAA MCA{1.8-5.0.7} Minecraft Comes Alive
Loaded coremods (and transformers):
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'

#522 and #523 also confirm this.

Fixed in 1.8-5.0.7.1. #526