• [Yes for 1.8] I am running the latest mod versions of MCA and RadixCore.
• [Yes] I can reproduce this issue with just MCA and RadixCore installed.
• [Yes] I can provide my Minecraft version and MCA version.
• [Yes, but not very far] I have searched for the issue previously and it was either not previously reported, or previously fixed and I'm having the same problem.
• [Yes] I am crashing and can provide my crash report.

Versions

Minecraft: 1.8 (Just 1.8, not 1.8.whatever)
MCA: 1.8-5.0.7.1 (tried all the versions)
RadixCore: 1.8-2.0.5 (Again, trying all versions)

Issue Description

The game just crashes upon right clicking a villager, then says "This villager is being interacted with" when reopening minecraft and right clicking. It's not my computer's fault, because my computer can almost be considered a gaming computer. Almost.

Reproduce Steps

So, I was playing my game yesterday, married a villager, changed her settings with the creative mode book, and then put her in a house I made. I interacted with her -- chat, joke, gift, everything worked. I had all my 60 something of my mods installed, no problems.

Today, I logged on, went to build for a bit, then went to my wife. I right clicked on her, my game froze, then crashed. I reopened my game, tried right clicking on her, and it kept saying "This villager is being interacted with." So, I tried interacting with another villager, and again, game crashed. Won't even open up the menu of things to do.

Opened a new flat creative world, tried spawning in a girl. My game couldn't load her and crashed. Took all my mods out, left in MCA and RadixCore, opened up a NEW world, spawned in a girl, tried interacting with her, and my game still crashed. Tried deleting and redownloading the version I have, same thing. Tried deleting and downloading different versions of MCA and RadixCore, same thing. Googled way to fix this, couldn't find a solution. So I came here for help.

Additional Information

Latest crash report with above settings.

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 5/16/16 7:01 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at mca.core.MCA.getPlayerData(MCA.java:651)
at mca.client.gui.GuiInteraction.(GuiInteraction.java:91)
at mca.packets.PacketOpenGUIOnEntity.processOnGameThread(PacketOpenGUIOnEntity.java:66)
at radixcore.network.AbstractPacketHandler.processPackets(AbstractPacketHandler.java:164)
at mca.core.forge.EventHooksFML.clientTickEventHandler(EventHooksFML.java:117)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_13_EventHooksFML_clientTickEventHandler_ClientTickEvent.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.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:371)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:2152)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1028)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:345)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Stacktrace:
at mca.core.MCA.getPlayerData(MCA.java:651)
at mca.client.gui.GuiInteraction.(GuiInteraction.java:91)
at mca.packets.PacketOpenGUIOnEntity.processOnGameThread(PacketOpenGUIOnEntity.java:66)
at radixcore.network.AbstractPacketHandler.processPackets(AbstractPacketHandler.java:164)
at mca.core.forge.EventHooksFML.clientTickEventHandler(EventHooksFML.java:117)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_13_EventHooksFML_clientTickEventHandler_ClientTickEvent.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.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:371)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['spittank'/4, l='MpServer', x=-9.36, y=237.00, z=-11.24]]
Chunk stats: MultiplayerChunkCache: 121, 121
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: 0.00,4.00,0.00 - World: (0,4,0), Chunk: (at 0,0,0 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: 1204 game time, 1204 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 5 total; [EntityHuman['Eden'/0, l='MpServer', x=-15.66, y=237.02, z=-28.34], EntityHuman['Becky'/1, l='MpServer', x=-1.72, y=237.02, z=-29.25], EntityHuman['Elise'/2, l='MpServer', x=-10.31, y=237.02, z=-11.97], EntityHuman['Celeste'/3, l='MpServer', x=-10.06, y=237.02, z=-10.19], EntityPlayerSP['spittank'/4, l='MpServer', x=-9.36, y=237.00, z=-11.24]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:351)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2502)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:374)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- 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: 379960256 bytes (362 MB) / 735879168 bytes (701 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: 0, tallocated: 0
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.4.1565 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{11.14.4.1565} Minecraft Forge
UCHIJAAAA RadixCore{1.8-2.0.5} RadixCore
UCHIJAAAA MCA{1.8-5.0.7.1} Minecraft Comes Alive
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '3.1.0 - Build 9.17.10.4229' Renderer: 'Intel(R) HD Graphics'
Launched Version: 1.8-forge1.8-11.14.4.1565
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics GL version 3.1.0 - Build 9.17.10.4229, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: [MCunleashed Default Resource Pack.zip]
Current Language: English (US)
Profiler Position: N/A (disabled)

UPDATE: So, I did a complete reboot (deleting all the files in the minecraft folder, then slowly replace everything...), and it worked to where I was able to interact with the villagers again. However, while reinstalling the rest of my mods (one by one), I found that the problem occurred again when installing certain mods that used to work fine before. And, once the problem occurred again, I needed to reboot again.

1.8 is no longer supported unfortunately. Update to 1.8.9 or 1.9.