Minecraft Client Crash

[23:41:38] [Client thread/FATAL]: Unreported exception thrown!
java.lang.ClassCastException: net.minecraft.item.ItemStack cannot be cast to java.lang.Byte
    at net.minecraft.entity.DataWatcher.getWatchableObjectByte(DataWatcher.java:80) ~[bin/:?]
    at net.minecraft.entity.player.EntityPlayer.isWearing(EntityPlayer.java:2396) ~[bin/:?]
    at net.minecraft.client.renderer.entity.RenderPlayer.setModelVisibilities(RenderPlayer.java:85) ~[bin/:?]
    at net.minecraft.client.renderer.entity.RenderPlayer.renderRightArm(RenderPlayer.java:166) ~[bin/:?]
    at net.minecraft.client.renderer.ItemRenderer.func_178095_a(ItemRenderer.java:242) ~[bin/:?]
    at net.minecraft.client.renderer.ItemRenderer.renderItemInFirstPerson(ItemRenderer.java:382) ~[bin/:?]
    at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:1018) ~[bin/:?]
    at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:963) ~[bin/:?]
    at net.minecraft.client.renderer.EntityRenderer.renderWorldPass(EntityRenderer.java:1898) ~[bin/:?]
    at net.minecraft.client.renderer.EntityRenderer.renderWorld(EntityRenderer.java:1528) ~[bin/:?]
    at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1326) ~[bin/:?]
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1044) ~[bin/:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:424) [bin/:?]
    at net.minecraft.client.main.Main.main(Main.java:113) [bin/:?]
    at Start.main(Start.java:11) [bin/:?]
[23:41:39] [Server thread/INFO]: Stopping server
[23:41:39] [Server thread/INFO]: Saving players
[23:41:39] [Server thread/INFO]: Saving worlds
[23:41:39] [Server thread/INFO]: Saving chunks for level 'New World'/Overworld
---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 01.01.20 23:41
Description: Unexpected error

java.lang.ClassCastException: net.minecraft.item.ItemStack cannot be cast to java.lang.Byte
    at net.minecraft.entity.DataWatcher.getWatchableObjectByte(DataWatcher.java:80)
    at net.minecraft.entity.player.EntityPlayer.isWearing(EntityPlayer.java:2396)
    at net.minecraft.client.renderer.entity.RenderPlayer.setModelVisibilities(RenderPlayer.java:85)
    at net.minecraft.client.renderer.entity.RenderPlayer.renderRightArm(RenderPlayer.java:166)
    at net.minecraft.client.renderer.ItemRenderer.func_178095_a(ItemRenderer.java:242)
    at net.minecraft.client.renderer.ItemRenderer.renderItemInFirstPerson(ItemRenderer.java:382)
    at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:1018)
    at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:963)
    at net.minecraft.client.renderer.EntityRenderer.renderWorldPass(EntityRenderer.java:1898)
    at net.minecraft.client.renderer.EntityRenderer.renderWorld(EntityRenderer.java:1528)
    at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1326)
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1044)
    at net.minecraft.client.Minecraft.run(Minecraft.java:424)
    at net.minecraft.client.main.Main.main(Main.java:113)
    at Start.main(Start.java:11)


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

-- Head --
Stacktrace:
    at net.minecraft.entity.DataWatcher.getWatchableObjectByte(DataWatcher.java:80)
    at net.minecraft.entity.player.EntityPlayer.isWearing(EntityPlayer.java:2396)
    at net.minecraft.client.renderer.entity.RenderPlayer.setModelVisibilities(RenderPlayer.java:85)
    at net.minecraft.client.renderer.entity.RenderPlayer.renderRightArm(RenderPlayer.java:166)
    at net.minecraft.client.renderer.ItemRenderer.func_178095_a(ItemRenderer.java:242)
    at net.minecraft.client.renderer.ItemRenderer.renderItemInFirstPerson(ItemRenderer.java:382)
    at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:1018)
    at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:963)
    at net.minecraft.client.renderer.EntityRenderer.renderWorldPass(EntityRenderer.java:1898)
    at net.minecraft.client.renderer.EntityRenderer.renderWorld(EntityRenderer.java:1528)

-- Affected level --
Details:
    Level name: MpServer
    All players: 0 total; []
    Chunk stats: MultiplayerChunkCache: 50, 50
    Level seed: 0
    Level generator: ID 00 - default, ver 1. Features enabled: false
    Level generator options:
    Level spawn location: 164,00,64,00,220,00 - World: (164,64,220), Chunk: (at 4,4,12 in 10,13; contains blocks 160,0,208 to 175,255,223), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Level time: 71 game time, 71 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: 1 total; [EntityPlayerSP['Player319'/710, l='MpServer', x=154,50, y=74,00, z=218,50]]
    Retry entities: 0 total; []
    Server brand: vanilla
    Server type: Integrated singleplayer server
Stacktrace:
    at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:401)
    at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2395)
    at net.minecraft.client.Minecraft.run(Minecraft.java:444)
    at net.minecraft.client.main.Main.main(Main.java:113)
    at Start.main(Start.java:11)

-- System Details --
Details:
    Minecraft Version: 1.8.8
    Operating System: Windows 10 (amd64) version 10.0
    CPU: 4x Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
    Java Version: 1.8.0_221, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 803666728 bytes (766 MB) / 1038876672 bytes (990 MB) up to 1038876672 bytes (990 MB)
    JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
    IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
    Launched Version: mcp
    LWJGL: 2.9.4
    OpenGL: Intel(R) HD Graphics 520 GL version 4.4.0 - Build 21.20.16.4599, 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: Very likely; Jar signature invalidated
    Type: Client (map_client.txt)
    Resource Packs:
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 4x Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
    OptiFine Version: OptiFine_1.8.8_HD_U_H8
    Render Distance Chunks: 8
    Mipmaps: 4
    Anisotropic Filtering: 1
    Antialiasing: 0
    Multitexture: false
    Shaders: null
    OpenGlVersion: 4.4.0 - Build 21.20.16.4599
    OpenGlRenderer: Intel(R) HD Graphics 520
    OpenGlVendor: Intel
    CpuCount: 4
#@!@# Game crashed! Crash report saved to: #@!@# C:\Users\mgman\Desktop\wind\jars\.\crash-reports\crash-2020-01-01_23.41.38-client.txt
AL lib: (EE) alc_cleanup: 1 device not closed
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release