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Whenever I exit a replay my game crashes and this error message pops up: The game crashed whilst unexpected error
Error: java.lang.NullPointerException: Unexpected error
Here's the crash report:
---- Minecraft Crash Report ----
// Ouch. That hurt

Time: 1/20/18 12:15 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at com.replaymod.replay.handler.GuiHandler.onButton(GuiHandler.java:139)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_43_GuiHandler_onButton_Pre.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:179)
at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:438)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:533)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:501)
at com.replaymod.replay.InputReplayTimer.func_74275_a(InputReplayTimer.java:49)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1079)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:397)
at net.minecraft.client.main.Main.main(SourceFile:123)
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:498)
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:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Mac OS X (x86_64) version 10.13.2
Java Version: 1.8.0_161, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1453203600 bytes (1385 MB) / 2080374784 bytes (1984 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.42 Powered by Forge 14.23.1.2599 14 mods loaded, 14 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

| State | ID | Version | Source | Signature |
|:------ |:----------------------- |:------------ |:----------------------------- |:---------------------------------------- |
| UCHIJA | minecraft | 1.12.2 | minecraft.jar | None |
| UCHIJA | mcp | 9.42 | minecraft.jar | None |
| UCHIJA | FML | 8.0.99.99 | forge-1.12.2-14.23.1.2599.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| UCHIJA | forge | 14.23.1.2599 | forge-1.12.2-14.23.1.2599.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| UCHIJA | mercurius_updater | 1.0 | MercuriusUpdater-1.12.2.jar | None |
| UCHIJA | replaymod-compat | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod-editor | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod-extras | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod-online | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod-recording | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod-render | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod-replay | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |
| UCHIJA | replaymod-simplepathing | 1.12.2-2.1.0 | replaymod-1.12.2-2.1.0.jar | None |

Loaded coremods (and transformers):
LoadingPlugin (replaymod-1.12.2-2.1.0.jar)

Launched Version: 1.12.2-forge1.12.2-14.23.1.2599
LWJGL: 2.9.4
OpenGL: NVIDIA GeForce 320M OpenGL Engine GL version 2.1 NVIDIA-10.4.14 310.90.30.05b27, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object 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: Yes
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: 1.9 AciDicBliTzz Light Blue Short Sword Pack By TBNRnorton or NortonPlayz - Minecraft (incompatible)
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 2x Intel(R) Core(TM)2 Duo CPU P8800 @ 2.66GHz