Sorry for directly posting the crash log, but it's not really long:

---- Minecraft Crash Report ----

WARNING: coremods are present:
Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
CTMCorePlugin (CTM-MC1.12.2-1.0.2.31.jar)
EntityCullingPlugin (EntityCulling-1.12.2-4.1.5.jar)
Contact their authors BEFORE contacting forge

// Uh... Did I do that?

Time: 7/25/21 4:18 AM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at it.hurts.metallurgy_reforged.gui.hud.KrikArmorHUD.render(KrikArmorHUD.java:30)
at it.hurts.metallurgy_reforged.gui.hud.HUDHandler.renderOverlay(HUDHandler.java:59)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_52_HUDHandler_renderOverlay_Post.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.client.GuiIngameForge.post(GuiIngameForge.java:911)
at net.minecraftforge.client.GuiIngameForge.func_175180_a(GuiIngameForge.java:207)
at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1426)
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 it.hurts.metallurgy_reforged.gui.hud.KrikArmorHUD.render(KrikArmorHUD.java:30)
at it.hurts.metallurgy_reforged.gui.hud.HUDHandler.renderOverlay(HUDHandler.java:59)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_52_HUDHandler_renderOverlay_Post.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.client.GuiIngameForge.post(GuiIngameForge.java:911)
at net.minecraftforge.client.GuiIngameForge.func_175180_a(GuiIngameForge.java:207)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['Druwan'/1996, l='MpServer', x=-232.14, y=66.00, z=241.36]]
Chunk stats: MultiplayerChunkCache: 49, 49
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-236,64,252), Chunk: (at 4,4,12 in -15,15; contains blocks -240,0,240 to -225,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 476 game time, 476 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: 20 total; [EntityCreeper['Creeper'/2563, l='MpServer', x=-228.50, y=40.00, z=245.50], EntityCreeper['Creeper'/2564, l='MpServer', x=-226.15, y=38.00, z=245.50], EntityCreeper['Creeper'/2565, l='MpServer', x=-221.34, y=20.00, z=256.70], EntityPlayerSP['Druwan'/1996, l='MpServer', x=-232.14, y=66.00, z=241.36], EntityBat['Pipistrello'/2506, l='MpServer', x=-243.17, y=38.55, z=230.60], EntityBat['Pipistrello'/2478, l='MpServer', x=-217.65, y=31.96, z=244.40], EntityCreeper['Creeper'/2512, l='MpServer', x=-227.50, y=41.25, z=250.85], EntityZombie['Zombi'/2513, l='MpServer', x=-221.27, y=29.00, z=252.51], EntityZombie['Zombi'/2514, l='MpServer', x=-243.50, y=55.00, z=227.50], EntityCow['Mucca'/116, l='MpServer', x=-242.86, y=65.00, z=237.47], EntityCow['Mucca'/117, l='MpServer', x=-245.02, y=64.00, z=240.20], EntityCow['Mucca'/118, l='MpServer', x=-247.01, y=64.00, z=238.67], EntityCow['Mucca'/119, l='MpServer', x=-244.88, y=65.00, z=236.90], EntityChicken['Gallina'/120, l='MpServer', x=-243.17, y=64.00, z=242.76], EntityChicken['Gallina'/121, l='MpServer', x=-243.45, y=64.00, z=240.58], EntityChicken['Gallina'/122, l='MpServer', x=-242.16, y=65.00, z=237.50], EntityChicken['Gallina'/123, l='MpServer', x=-239.55, y=65.00, z=240.57], EntityBat['Pipistrello'/2491, l='MpServer', x=-222.52, y=32.00, z=248.75], EntityZombie['Zombi'/2526, l='MpServer', x=-226.50, y=40.00, z=250.50], EntitySkeleton['Scheletro'/2558, l='MpServer', x=-217.50, y=20.00, z=247.50]]
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:532)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:427)
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: 1009746368 bytes (962 MB) / 1975517184 bytes (1884 MB) up to 5070913536 bytes (4836 MB)
JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx5440m -Xms256m -XX:PermSize=256m
IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
FML: MCP 9.42 Powered by Forge 14.23.5.2854 Optifine OptiFine_1.12.2_HD_U_G5 17 mods loaded, 17 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 | entity_culling     | 4.1.5                    | minecraft.jar                                                | None                                     |
| LCHIJA | jei                | 4.16.1.301               | jei_1.12.2-4.16.1.301.jar                                    | None                                     |
| LCHIJA | appleskin          | 1.0.14                   | AppleSkin-mc1.12-1.0.14.jar                                  | None                                     |
| LCHIJA | armorchroma        | 1.4-beta                 | armorchroma-1.12.2-1.4.jar                                   | None                                     |
| LCHIJA | ctm                | MC1.12.2-1.0.2.31        | CTM-MC1.12.2-1.0.2.31.jar                                    | None                                     |
| LCHIJA | fastgamemodeswitch | 1.0.0                    | Fast Gamemode Switch 1.12.2 - 1.2.jar                        | None                                     |
| LCHIJA | com.boydti.fawe    | 3.5.1                    | FastAsyncWorldEdit-forge112-19.11.13-5505943-1282-22.3.5.jar | None                                     |
| LCHIJA | inventorytweaks    | 1.63+release.109.220f184 | InventoryTweaks-1.63.jar                                     | 55d2cd4f5f0961410bf7b91ef6c6bf00a766dcbe |
| LCHIJA | journeymap         | 1.12.2-5.7.1             | journeymap-1.12.2-5.7.1.jar                                  | None                                     |
| LCHIJA | metallurgy         | 1.2.9                    | Metallurgy-4-Reforged-1.2.9.jar                              | None                                     |
| LCHIJA | mousetweaks        | 2.10                     | MouseTweaks-2.10-mc1.12.2.jar                                | None                                     |
| LCHIJA | worldedit          | 6.1.10                   | worldedit-forge-mc1.12.2-6.1.10-dist.jar                     | None                                     |
| LCHIJA | worldeditcuife3    | 3.0.9                    | WorldEdit-CUI-FE3-1.12.2-3.0.9.jar                           | None                                     |

Loaded coremods (and transformers): 

Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
invtweaks.forge.asm.ContainerTransformer
CTMCorePlugin (CTM-MC1.12.2-1.0.2.31.jar)
team.chisel.ctm.client.asm.CTMTransformer
EntityCullingPlugin (EntityCulling-1.12.2-4.1.5.jar)
meldexun.entityculling.plugin.EntityCullingTransformer
GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 461.40' Renderer: 'GeForce GTX 1050 Ti/PCIe/SSE2'
Launched Version: forge-14.23.5.2854
LWJGL: 2.9.4
OpenGL: GeForce GTX 1050 Ti/PCIe/SSE2 GL version 4.6.0 NVIDIA 461.40, 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: Yes
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: Izmargad.zip
Current Language: Italiano (Italia)
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
OptiFine Version: OptiFine_1.12.2_HD_U_G5
OptiFine Build: 20210124-142939
Render Distance Chunks: 2
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.6.0 NVIDIA 461.40
OpenGlRenderer: GeForce GTX 1050 Ti/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 8