minecraft keeps crashing and saying "shutting down internal servers"

---- Minecraft Crash Report ----

WARNING: coremods are present:
  weaponlib (mw_2.0-0.4.4.6_mc1.12.2.jar)
Contact their authors BEFORE contacting forge

// You should try our sister game, Minceraft!

Time: 10/30/20 10:35 PM
Description: Rendering item

java.lang.IllegalStateException: Not building!
    at net.minecraft.client.renderer.BufferBuilder.func_178977_d(BufferBuilder.java:537)
    at net.minecraft.client.renderer.Tessellator.func_78381_a(SourceFile:21)
    at com.vicmatskiv.weaponlib.compatibility.CompatibleWeaponRenderer.func_188616_a(CompatibleWeaponRenderer.java:144)
    at net.minecraftforge.client.ForgeHooksClient.renderLitItem(ForgeHooksClient.java:653)
    at net.minecraft.client.renderer.RenderItem.func_191967_a(RenderItem.java:118)
    at net.minecraft.client.renderer.RenderItem.func_191961_a(RenderItem.java:106)
    at net.minecraft.client.renderer.RenderItem.func_180454_a(RenderItem.java:149)
    at net.minecraft.client.renderer.RenderItem.func_191962_a(RenderItem.java:308)
    at net.minecraft.client.renderer.RenderItem.func_184391_a(RenderItem.java:347)
    at net.minecraft.client.renderer.RenderItem.func_180450_b(RenderItem.java:336)
    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147051_a(GuiContainerCreative.java:922)
    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_146976_a(GuiContainerCreative.java:758)
    at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:75)
    at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(InventoryEffectRenderer.java:51)
    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73863_a(GuiContainerCreative.java:643)
    at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:396)
    at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1124)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1119)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
    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:497)
    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 --
Thread: Client thread
Stacktrace:
    at net.minecraft.client.renderer.BufferBuilder.func_178977_d(BufferBuilder.java:537)
    at net.minecraft.client.renderer.Tessellator.func_78381_a(SourceFile:21)
    at com.vicmatskiv.weaponlib.compatibility.CompatibleWeaponRenderer.func_188616_a(CompatibleWeaponRenderer.java:144)
    at net.minecraftforge.client.ForgeHooksClient.renderLitItem(ForgeHooksClient.java:653)
    at net.minecraft.client.renderer.RenderItem.func_191967_a(RenderItem.java:118)
    at net.minecraft.client.renderer.RenderItem.func_191961_a(RenderItem.java:106)
    at net.minecraft.client.renderer.RenderItem.func_180454_a(RenderItem.java:149)
    at net.minecraft.client.renderer.RenderItem.func_191962_a(RenderItem.java:308)

-- Item being rendered --
Details:
    Item Type: com.vicmatskiv.weaponlib.Weapon@2517308f
    Registry Name: mw:m16a4
    Item Aux: 0
    Item NBT: null
    Item Foil: false
Stacktrace:
    at net.minecraft.client.renderer.RenderItem.func_184391_a(RenderItem.java:347)
    at net.minecraft.client.renderer.RenderItem.func_180450_b(RenderItem.java:336)
    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147051_a(GuiContainerCreative.java:922)
    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_146976_a(GuiContainerCreative.java:758)
    at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:75)
    at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(InventoryEffectRenderer.java:51)
    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73863_a(GuiContainerCreative.java:643)
    at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:396)

-- Screen render details --
Details:
    Screen name: net.minecraft.client.gui.inventory.GuiContainerCreative
    Mouse location: Scaled: (296, 14). Absolute: (593, 451)
    Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
    Level name: MpServer
    All players: 1 total; [EntityPlayerSP['Nigel882'/365, l='MpServer', x=79.72, y=83.00, z=-5.49]]
    Chunk stats: MultiplayerChunkCache: 1882, 1882
    Level seed: 0
    Level generator: ID 00 - default, ver 1. Features enabled: false
    Level generator options: 
    Level spawn location: World: (100,64,-71), Chunk: (at 4,4,9 in 6,-5; contains blocks 96,0,-80 to 111,255,-65), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
    Level time: 3158 game time, 3158 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: 95 total; [EntitySquid['Squid'/129, l='MpServer', x=62.43, y=62.04, z=-71.05], EntityZombie['Zombie'/132, l='MpServer', x=58.50, y=19.00, z=-62.50], EntityRabbit['Rabbit'/133, l='MpServer', x=57.39, y=71.00, z=-17.30], EntitySkeleton['Skeleton'/134, l='MpServer', x=53.50, y=31.00, z=-11.50], EntityRabbit['Rabbit'/135, l='MpServer', x=63.07, y=72.00, z=-8.42], EntityBat['Bat'/136, l='MpServer', x=49.90, y=26.73, z=16.67], EntityRabbit['Rabbit'/137, l='MpServer', x=51.31, y=67.00, z=6.46], EntitySkeleton['Skeleton'/138, l='MpServer', x=61.04, y=19.00, z=28.50], EntitySkeleton['Skeleton'/139, l='MpServer', x=56.21, y=24.00, z=23.50], EntitySkeleton['Skeleton'/140, l='MpServer', x=54.50, y=47.00, z=16.50], EntityRabbit['Rabbit'/141, l='MpServer', x=60.53, y=66.00, z=29.03], EntityCreeper['Creeper'/142, l='MpServer', x=60.50, y=39.00, z=44.50], EntityBat['Bat'/143, l='MpServer', x=60.75, y=41.10, z=60.25], EntitySpider['Spider'/144, l='MpServer', x=59.50, y=39.00, z=48.50], EntitySpider['Spider'/145, l='MpServer', x=61.64, y=39.00, z=49.82], EntitySkeleton['Skeleton'/154, l='MpServer', x=77.50, y=43.00, z=-44.50], EntityCreeper['Creeper'/155, l='MpServer', x=79.17, y=15.00, z=-23.36], EntitySkeleton['Skeleton'/156, l='MpServer', x=78.50, y=15.00, z=-20.50], EntitySkeleton['Skeleton'/157, l='MpServer', x=76.05, y=15.00, z=-17.96], EntitySkeleton['Skeleton'/158, l='MpServer', x=64.50, y=23.00, z=-23.50], EntityCreeper['Creeper'/159, l='MpServer', x=78.59, y=29.00, z=-21.20], EntityEnderman['Enderman'/160, l='MpServer', x=75.61, y=15.00, z=-13.67], EntitySkeleton['Skeleton'/161, l='MpServer', x=76.50, y=13.00, z=41.50], EntityRabbit['Rabbit'/162, l='MpServer', x=72.42, y=63.00, z=47.41], EntityRabbit['Rabbit'/163, l='MpServer', x=79.40, y=64.00, z=35.54], EntityCreeper['Creeper'/164, l='MpServer', x=76.50, y=35.00, z=54.50], EntityCreeper['Creeper'/165, l='MpServer', x=78.50, y=35.00, z=54.50], EntityRabbit['Rabbit'/166, l='MpServer', x=74.45, y=63.00, z=52.38], EntityBat['Bat'/169, l='MpServer', x=80.11, y=24.10, z=-55.01], EntityCreeper['Creeper'/170, l='MpServer', x=81.48, y=42.25, z=-50.84], EntitySkeleton['Skeleton'/171, l='MpServer', x=87.50, y=13.00, z=-38.31], EntityCreeper['Creeper'/172, l='MpServer', x=87.50, y=41.00, z=-40.50], EntityCreeper['Creeper'/173, l='MpServer', x=87.50, y=41.00, z=-37.50], EntitySkeleton['Skeleton'/174, l='MpServer', x=88.50, y=33.00, z=-36.50], EntitySkeleton['Skeleton'/175, l='MpServer', x=83.50, y=15.00, z=-17.50], EntityCreeper['Creeper'/176, l='MpServer', x=82.17, y=15.00, z=-22.16], EntityCreeper['Creeper'/177, l='MpServer', x=91.50, y=15.00, z=-13.50], EntityCreeper['Creeper'/178, l='MpServer', x=91.50, y=24.00, z=36.50], EntityRabbit['Rabbit'/179, l='MpServer', x=80.31, y=63.00, z=43.82], EntityCreeper['Creeper'/180, l='MpServer', x=95.50, y=15.00, z=49.50], EntitySkeleton['Skeleton'/181, l='MpServer', x=89.77, y=21.00, z=59.50], EntityCreeper['Creeper'/182, l='MpServer', x=80.50, y=35.00, z=52.50], EntitySpider['Spider'/183, l='MpServer', x=86.94, y=32.00, z=57.37], EntityRabbit['Rabbit'/184, l='MpServer', x=90.46, y=64.00, z=49.30], EntitySkeleton['Skeleton'/185, l='MpServer', x=81.50, y=18.00, z=65.50], EntitySkeleton['Skeleton'/192, l='MpServer', x=97.50, y=15.00, z=-56.50], EntityBat['Bat'/193, l='MpServer', x=106.43, y=15.97, z=-51.36], EntityCreeper['Creeper'/194, l='MpServer', x=102.70, y=32.10, z=-54.70], EntityZombie['Zombie'/195, l='MpServer', x=96.81, y=34.00, z=-49.27], EntityBat['Bat'/68, l='MpServer', x=8.87, y=38.10, z=-83.25], EntitySkeleton['Skeleton'/196, l='MpServer', x=99.50, y=22.00, z=-42.50], EntitySpider['Spider'/197, l='MpServer', x=95.75, y=34.00, z=-48.26], EntityBat['Bat'/70, l='MpServer', x=-0.49, y=60.56, z=-79.78], EntitySkeleton['Skeleton'/198, l='MpServer', x=108.50, y=18.00, z=-27.50], EntityBat['Bat'/199, l='MpServer', x=104.26, y=29.09, z=-7.05], EntityBat['Bat'/72, l='MpServer', x=5.68, y=22.80, z=-72.22], EntityBat['Bat'/200, l='MpServer', x=103.70, y=29.42, z=-8.51], EntityBat['Bat'/73, l='MpServer', x=11.71, y=59.44, z=-76.70], EntitySpider['Spider'/201, l='MpServer', x=106.50, y=24.00, z=45.50], EntityRabbit['Rabbit'/74, l='MpServer', x=11.54, y=73.00, z=-79.76], EntityCreeper['Creeper'/202, l='MpServer', x=97.50, y=15.00, z=49.50], EntityCreeper['Creeper'/75, l='MpServer', x=13.50, y=65.00, z=-77.50], EntityCreeper['Creeper'/76, l='MpServer', x=15.50, y=16.00, z=-37.50], EntitySpider['Spider'/77, l='MpServer', x=6.50, y=14.00, z=-28.50], EntityCreeper['Creeper'/78, l='MpServer', x=8.50, y=14.00, z=-29.50], EntitySquid['Squid'/207, l='MpServer', x=122.60, y=60.73, z=-48.60], EntitySquid['Squid'/208, l='MpServer', x=125.52, y=61.79, z=-43.63], EntitySquid['Squid'/209, l='MpServer', x=118.52, y=62.00, z=-44.25], EntitySquid['Squid'/210, l='MpServer', x=124.60, y=61.31, z=-43.84], EntityRabbit['Rabbit'/216, l='MpServer', x=142.50, y=75.00, z=-23.03], EntityRabbit['Rabbit'/217, l='MpServer', x=133.90, y=74.00, z=-25.52], EntitySkeleton['Skeleton'/90, l='MpServer', x=23.49, y=20.00, z=-76.73], EntityRabbit['Rabbit'/91, l='MpServer', x=31.50, y=78.00, z=-75.50], EntityRabbit['Rabbit'/92, l='MpServer', x=22.59, y=77.00, z=-76.99], EntityCreeper['Creeper'/93, l='MpServer', x=21.17, y=20.00, z=-40.48], EntityCreeper['Creeper'/94, l='MpServer', x=30.50, y=29.00, z=-8.50], EntitySkeleton['Skeleton'/95, l='MpServer', x=17.74, y=25.00, z=3.46], EntityCreeper['Creeper'/96, l='MpServer', x=16.50, y=25.00, z=2.50], EntityCreeper['Creeper'/97, l='MpServer', x=23.58, y=23.00, z=26.84], EntityCreeper['Creeper'/98, l='MpServer', x=28.50, y=40.00, z=62.50], EntityBat['Bat'/99, l='MpServer', x=43.62, y=38.23, z=67.05], EntityCreeper['Creeper'/103, l='MpServer', x=33.43, y=18.25, z=-32.18], EntityCreeper['Creeper'/104, l='MpServer', x=39.84, y=40.00, z=-46.41], EntitySkeleton['Skeleton'/105, l='MpServer', x=36.50, y=18.00, z=-29.50], EntityBat['Bat'/106, l='MpServer', x=36.76, y=29.27, z=-23.56], EntitySkeleton['Skeleton'/107, l='MpServer', x=34.50, y=34.00, z=-30.50], EntitySkeleton['Skeleton'/108, l='MpServer', x=37.50, y=34.00, z=-30.50], EntityBat['Bat'/109, l='MpServer', x=39.18, y=33.75, z=-26.38], EntityPlayerSP['Nigel882'/365, l='MpServer', x=79.72, y=83.00, z=-5.49], EntityBat['Bat'/110, l='MpServer', x=50.60, y=25.78, z=7.35], EntityCreeper['Creeper'/111, l='MpServer', x=40.50, y=19.00, z=24.50], EntityCreeper['Creeper'/112, l='MpServer', x=39.56, y=19.00, z=23.80], EntityCreeper['Creeper'/113, l='MpServer', x=38.50, y=19.00, z=25.50], EntitySkeleton['Skeleton'/114, l='MpServer', x=35.50, y=28.00, z=20.50], EntitySkeleton['Skeleton'/115, l='MpServer', x=40.50, y=50.00, z=60.50]]
    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:420)
    at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:419)
    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:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 544505776 bytes (519 MB) / 1778384896 bytes (1696 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
    FML: MCP 9.42 Powered by Forge 14.23.5.2854 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

    | State  | ID        | Version      | Source                        | Signature                                |
    |:------ |:--------- |:------------ |:----------------------------- |:---------------------------------------- |
    | LCHIJA | minecraft | 1.12.2       | minecraft.jar                 | None                                     |
    | LCHIJA | mcp       | 9.42         | minecraft.jar                 | None                                     |
    | LCHIJA | FML       | 8.0.99.99    | forge-1.12.2-14.23.5.2854.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | forge     | 14.23.5.2854 | forge-1.12.2-14.23.5.2854.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | mw        | 0.4.4.6      | mw_2.0-0.4.4.6_mc1.12.2.jar   | None                                     |

    Loaded coremods (and transformers): 
weaponlib (mw_2.0-0.4.4.6_mc1.12.2.jar)
  com.vicmatskiv.weaponlib.core.WeaponlibClassTransformer
    GL info: ' Vendor: 'Intel' Version: '4.5.0 - Build 24.20.100.6223' Renderer: 'Intel(R) UHD Graphics 630'
    Launched Version: 1.12.2-forge-14.23.5.2854
    LWJGL: 2.9.4
    OpenGL: Intel(R) UHD Graphics 630 GL version 4.5.0 - Build 24.20.100.6223, 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: Yes
    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: 8x Intel(R) Core(TM) i5-8300H CPU @ 2.30GHz