Client Crashes When Building Computer

Not sure if this has been asked yet but I have recently installed Forge and Computer craft on my 1.8.9 server. It has worked before on my computer at home now renting a server to free up my computer. When I put in the ingredients for a computer it shows the computer in the build window. When I click on it to put in my inventory or hold it crashes the client. Any ideas why?

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

Time: 1/27/16 12:00 AM
Description: Updating screen events

java.lang.ArrayIndexOutOfBoundsException: -1
at net.minecraft.item.ItemStack.func_77980_a(ItemStack.java:415)
at net.minecraft.inventory.SlotCrafting.func_75208_c(SlotCrafting.java:52)
at net.minecraft.inventory.SlotCrafting.func_82870_a(SlotCrafting.java:116)
at net.minecraft.inventory.Container.func_75144_a(Container.java:314)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(PlayerControllerMP.java:488)
at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(GuiContainer.java:629)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:388)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:554)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:523)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1674)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1024)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:349)
at net.minecraft.client.main.Main.main(SourceFile:124)
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 net.minecraft.item.ItemStack.func_77980_a(ItemStack.java:415)
at net.minecraft.inventory.SlotCrafting.func_75208_c(SlotCrafting.java:52)
at net.minecraft.inventory.SlotCrafting.func_82870_a(SlotCrafting.java:116)
at net.minecraft.inventory.Container.func_75144_a(Container.java:314)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(PlayerControllerMP.java:488)
at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(GuiContainer.java:629)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(GuiContainer.java:388)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:554)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:523)

– Affected screen –
Details:
Screen name: net.minecraft.client.gui.inventory.GuiCrafting

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['XelGar256'/18826, l='MpServer', x=-256.76, y=63.00, z=256.81]]
Chunk stats: MultiplayerChunkCache: 440, 440
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: -213.00,64.00,259.00 - World: (-213,64,259), Chunk: (at 11,4,3 in -14,16; contains blocks -224,0,256 to -209,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 111898 game time, 127609 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: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 96 total; [EntityPlayerSP['XelGar256'/18826, l='MpServer', x=-256.76, y=63.00, z=256.81], EntityCow['Cow'/129, l='MpServer', x=-260.88, y=63.00, z=210.50], EntityBat['Bat'/19971, l='MpServer', x=-333.23, y=25.79, z=243.34], EntitySkeleton['Skeleton'/18822, l='MpServer', x=-323.50, y=34.00, z=336.50], EntityBat['Bat'/18311, l='MpServer', x=-316.03, y=42.13, z=305.75], EntitySquid['Squid'/19082, l='MpServer', x=-281.38, y=58.81, z=233.97], EntitySkeleton['Skeleton'/20236, l='MpServer', x=-282.50, y=25.00, z=307.50], EntitySkeleton['Skeleton'/16150, l='MpServer', x=-322.50, y=13.00, z=336.50], EntitySheep['Sheep'/151, l='MpServer', x=-251.63, y=68.00, z=202.09], EntityCow['Cow'/152, l='MpServer', x=-245.03, y=64.00, z=202.00], EntitySheep['Sheep'/153, l='MpServer', x=-254.44, y=63.00, z=218.78], EntitySheep['Sheep'/154, l='MpServer', x=-243.44, y=64.00, z=209.72], EntityCow['Cow'/155, l='MpServer', x=-240.47, y=64.00, z=210.56], EntitySkeleton['Skeleton'/156, l='MpServer', x=-248.78, y=49.00, z=232.38], EntitySkeleton['Skeleton'/20124, l='MpServer', x=-312.50, y=53.00, z=311.50], EntityBat['Bat'/157, l='MpServer', x=-247.09, y=50.10, z=231.38], EntitySquid['Squid'/8606, l='MpServer', x=-259.50, y=57.00, z=283.94], EntityZombie['Zombie'/158, l='MpServer', x=-249.81, y=48.00, z=233.47], EntityBat['Bat'/10398, l='MpServer', x=-239.50, y=55.10, z=239.75], EntityZombie['Zombie'/159, l='MpServer', x=-238.44, y=41.00, z=253.28], EntityBat['Bat'/160, l='MpServer', x=-243.25, y=52.10, z=243.44], EntitySpider['Spider'/19233, l='MpServer', x=-189.50, y=16.00, z=259.50], EntityZombie['Zombie'/20258, l='MpServer', x=-326.66, y=30.00, z=243.34], EntitySkeleton['Skeleton'/19364, l='MpServer', x=-299.50, y=38.00, z=315.50], EntitySkeleton['Skeleton'/20004, l='MpServer', x=-296.50, y=38.00, z=317.50], EntityWitch['Witch'/17960, l='MpServer', x=-184.50, y=33.00, z=282.50], EntitySheep['Sheep'/169, l='MpServer', x=-224.34, y=65.00, z=194.91], EntitySheep['Sheep'/170, l='MpServer', x=-224.81, y=64.00, z=242.13], EntityCreeper['Creeper'/19626, l='MpServer', x=-182.50, y=17.00, z=293.50], EntitySkeleton['Skeleton'/18349, l='MpServer', x=-193.50, y=36.00, z=178.50], EntityCreeper['Creeper'/16046, l='MpServer', x=-178.50, y=54.00, z=302.50], EntityZombie['Zombie'/19377, l='MpServer', x=-312.66, y=51.00, z=299.34], EntityCreeper['Creeper'/19509, l='MpServer', x=-324.66, y=13.00, z=316.94], EntitySheep['Sheep'/182, l='MpServer', x=-221.47, y=65.00, z=209.53], EntitySheep['Sheep'/183, l='MpServer', x=-221.47, y=66.00, z=208.22], EntitySheep['Sheep'/184, l='MpServer', x=-212.50, y=69.00, z=214.88], EntitySheep['Sheep'/185, l='MpServer', x=-221.25, y=64.00, z=234.13], EntityEnderman['Enderman'/19385, l='MpServer', x=-285.50, y=26.00, z=308.50], EntitySheep['Sheep'/187, l='MpServer', x=-217.13, y=65.00, z=316.88], EntityBat['Bat'/17723, l='MpServer', x=-322.72, y=17.88, z=319.78], EntityCow['Cow'/188, l='MpServer', x=-208.72, y=64.00, z=311.19], EntityBat['Bat'/17724, l='MpServer', x=-268.25, y=19.10, z=220.19], EntitySheep['Sheep'/189, l='MpServer', x=-209.94, y=64.00, z=325.16], EntityZombie['Zombie'/18113, l='MpServer', x=-280.97, y=26.00, z=250.41], EntityCow['Cow'/193, l='MpServer', x=-206.66, y=71.00, z=218.47], EntityCreeper['Creeper'/20290, l='MpServer', x=-295.50, y=31.00, z=314.50], EntitySheep['Sheep'/196, l='MpServer', x=-195.16, y=61.00, z=294.53], EntitySheep['Sheep'/68, l='MpServer', x=-327.16, y=63.00, z=241.53], EntitySkeleton['Skeleton'/20292, l='MpServer', x=-326.50, y=10.00, z=320.50], EntitySheep['Sheep'/197, l='MpServer', x=-197.00, y=63.00, z=298.03], EntitySheep['Sheep'/69, l='MpServer', x=-319.25, y=64.00, z=246.22], EntitySheep['Sheep'/70, l='MpServer', x=-323.34, y=66.00, z=256.41], EntitySheep['Sheep'/73, l='MpServer', x=-322.16, y=64.00, z=299.22], EntitySheep['Sheep'/202, l='MpServer', x=-198.94, y=63.00, z=307.91], EntitySheep['Sheep'/74, l='MpServer', x=-334.09, y=64.00, z=294.97], EntityCow['Cow'/203, l='MpServer', x=-206.84, y=64.00, z=314.19], EntitySheep['Sheep'/75, l='MpServer', x=-325.16, y=64.00, z=295.75], EntitySkeleton['Skeleton'/18635, l='MpServer', x=-330.50, y=34.00, z=241.50], EntityCow['Cow'/204, l='MpServer', x=-206.50, y=63.00, z=329.88], EntitySheep['Sheep'/76, l='MpServer', x=-324.63, y=64.00, z=297.47], EntityCow['Cow'/205, l='MpServer', x=-203.00, y=63.00, z=322.53], EntitySheep['Sheep'/206, l='MpServer', x=-206.53, y=63.00, z=328.66], EntitySkeleton['Skeleton'/19407, l='MpServer', x=-319.72, y=20.00, z=317.91], EntitySkeleton['Skeleton'/17746, l='MpServer', x=-278.50, y=33.00, z=322.50], EntityBat['Bat'/20307, l='MpServer', x=-308.50, y=52.00, z=304.50], EntitySheep['Sheep'/84, l='MpServer', x=-311.97, y=67.00, z=250.06], EntitySheep['Sheep'/85, l='MpServer', x=-314.00, y=64.00, z=277.97], EntitySheep['Sheep'/86, l='MpServer', x=-309.91, y=64.00, z=273.22], EntityRabbit['Rabbit'/215, l='MpServer', x=-182.59, y=67.00, z=179.38], EntitySpider['Spider'/19159, l='MpServer', x=-317.50, y=38.00, z=326.50], EntityCreeper['Creeper'/19544, l='MpServer', x=-181.50, y=30.00, z=255.50], EntityPig['Pig'/217, l='MpServer', x=-179.69, y=64.00, z=257.53], EntitySheep['Sheep'/91, l='MpServer', x=-299.97, y=68.00, z=309.97], EntitySheep['Sheep'/219, l='MpServer', x=-189.19, y=65.00, z=286.41], EntitySpider['Spider'/20059, l='MpServer', x=-282.18, y=10.00, z=237.26], EntitySheep['Sheep'/95, l='MpServer', x=-313.91, y=63.00, z=327.03], EntitySheep['Sheep'/224, l='MpServer', x=-179.88, y=63.00, z=311.22], EntitySheep['Sheep'/225, l='MpServer', x=-179.94, y=63.00, z=308.91], EntityBat['Bat'/17633, l='MpServer', x=-312.75, y=53.10, z=312.09], EntityZombie['Zombie'/20193, l='MpServer', x=-337.56, y=26.22, z=212.28], EntityZombie['Zombie'/17378, l='MpServer', x=-182.50, y=29.00, z=263.50], EntitySheep['Sheep'/99, l='MpServer', x=-303.41, y=63.00, z=271.66], EntitySheep['Sheep'/101, l='MpServer', x=-299.69, y=69.00, z=304.13], EntityBat['Bat'/19046, l='MpServer', x=-301.66, y=52.88, z=321.59], EntitySkeleton['Skeleton'/19430, l='MpServer', x=-297.50, y=27.00, z=298.50], EntityCreeper['Creeper'/19560, l='MpServer', x=-311.50, y=49.00, z=319.50], EntitySkeleton['Skeleton'/20076, l='MpServer', x=-198.50, y=30.00, z=274.50], EntityBat['Bat'/19053, l='MpServer', x=-319.56, y=24.10, z=333.25], EntitySquid['Squid'/19824, l='MpServer', x=-318.16, y=58.50, z=297.28], EntitySheep['Sheep'/113, l='MpServer', x=-284.41, y=67.00, z=312.81], EntityItem['item.item.rottenFlesh'/19442, l='MpServer', x=-278.16, y=60.00, z=245.97], EntityZombie['Zombie'/20082, l='MpServer', x=-310.50, y=39.00, z=308.50], EntitySpider['Spider'/19188, l='MpServer', x=-255.50, y=20.00, z=192.50], EntityZombie['Zombie'/19572, l='MpServer', x=-239.50, y=38.00, z=221.50], EntityZombie['Zombie'/19704, l='MpServer', x=-194.50, y=29.00, z=264.50], EntityCreeper['Creeper'/19837, l='MpServer', x=-293.50, y=33.00, z=323.50]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:347)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2536)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:370)
at net.minecraft.client.main.Main.main(SourceFile:124)
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: 1.8.9
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: 266024616 bytes (253 MB) / 615911424 bytes (587 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: 13, tallocated: 95
FML: MCP 9.19 Powered by Forge 11.15.0.1719 4 mods loaded, 4 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJA mcp{9.18} [Minecraft Coder Pack] (minecraft.jar)
UCHIJA FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.0.1719.jar)
UCHIJA Forge{11.15.0.1719} [Minecraft Forge] (forge-1.8.9-11.15.0.1719.jar)
UCHIJA ComputerCraft{1.78} [ComputerCraft] (ComputerCraft1.78.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.5.0 NVIDIA 358.91' Renderer: 'GeForce GTX 660/PCIe/SSE2'
Launched Version: 1.8.9-forge1.8.9-11.15.0.1719
LWJGL: 2.9.4
OpenGL: GeForce GTX 660/PCIe/SSE2 GL version 4.5.0 NVIDIA 358.91, NVIDIA Corporation
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:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x AMD FX™-4100 Quad-Core Processor

Same thing if you bump your client and server to the latest and / or recommended Forge versions? What about in a single player world?

http://files.minecraftforge.net/maven/net/minecraftforge/forge/index_1.8.9.html

It works in single player.. I did figure it out. For some reason when I did a copy command to the mods directory it didn't really copy there even if I did an ls command. So I just made sure I was in the right directory and then uploaded computercraft. Thank you for the response.