Placing everything else works fine, I just can't open a PC case without the game crashing. When I right click, the game freezes for a second, then saves and crashes.

MultiMC outputs this error:

[17:12:13] [Tablet Renderer/INFO]: [STDERR]: java.lang.NullPointerException
[17:12:13] [Tablet Renderer/INFO]: [STDERR]: at javax.imageio.stream.FileCacheImageOutputStream.close(Unknown Source)
[17:12:13] [Tablet Renderer/INFO]: [STDERR]: at javax.imageio.ImageIO.write(Unknown Source)
[17:12:13] [Tablet Renderer/INFO]: [STDERR]: at mcvmcomputers.client.tablet.TabletOS.render(TabletOS.java:578)
[17:12:13] [Tablet Renderer/INFO]: [STDERR]: at net.minecraft.class_310$Anonymous$c1d499dce0244225bcdd10e82a3b3e72.run(GameloopMixin.java:105)
Exception in thread "Tablet Renderer" AL lib: (EE) alc_cleanup: 1 device not closed
Process exited with code -1.

Crash Report:

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 10/28/20 5:12 PM
Description: Rendering screen

java.lang.NoSuchMethodError: net.minecraft.class_1087.method_24304()Z
at mcvmcomputers.client.gui.GuiPCEditing.renderItem(GuiPCEditing.java:154)
at mcvmcomputers.client.gui.GuiPCEditing.renderBackgroundAndMobo(GuiPCEditing.java:87)
at mcvmcomputers.client.gui.GuiPCEditing.render(GuiPCEditing.java:233)
at net.minecraft.class_757.method_3192(class_757.java:604)
at net.minecraft.class_310.method_1523(class_310.java:947)
at net.minecraft.class_310.method_1514(class_310.java:585)
at net.minecraft.client.main.Main.main(Main.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)

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

-- Head --
Thread: Render thread
Stacktrace:
at mcvmcomputers.client.gui.GuiPCEditing.renderItem(GuiPCEditing.java:154)
at mcvmcomputers.client.gui.GuiPCEditing.renderBackgroundAndMobo(GuiPCEditing.java:87)
at mcvmcomputers.client.gui.GuiPCEditing.render(GuiPCEditing.java:233)

-- Screen render details --
Details:
Screen name: mcvmcomputers.client.gui.GuiPCEditing
Mouse location: Scaled: (240, 135). Absolute: (960.000000, 540.000000)
Screen size: Scaled: (480, 270). Absolute: (1920, 1080). Scale factor of 4.000000

-- Affected level --
Details:
All players: 1 total; [class_746['TrekkerMine'/32, l='MpServer', x=-22.37, y=62.00, z=6.48]]
Chunk stats: Client Chunk Cache: 841, 529
Level dimension: minecraft:overworld
Level name: MpServer
Level seed: -7533689228064939491
Level generator: ID 05 - buffet, ver 0. Features enabled: false
Level generator options: {}
Level spawn location: World: (-16,40,22), Chunk: (at 0,2,6 in -1,1; contains blocks -16,0,16 to -1,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 18166 game time, 28855 day time
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
Server brand: fabric
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.class_638.method_8538(class_638.java:450)
at net.minecraft.class_310.method_1587(class_310.java:1878)
at net.minecraft.class_310.method_1514(class_310.java:600)
at net.minecraft.client.main.Main.main(Main.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)

-- System Details --
Details:
Minecraft Version: 1.15.1
Minecraft Version ID: 1.15.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_231, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 2035342888 bytes (1941 MB) / 2945449984 bytes (2809 MB) up to 4660396032 bytes (4444 MB)
CPUs: 4
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms1000m -Xmx5000m
Fabric Mods:
fabric: Fabric API 0.23.0+build.328-1.15
fabric-api-base: Fabric API Base 0.1.2+b7f9825d0c
fabric-biomes-v1: Fabric Biomes (v1) 0.1.5+3b05f68e0c
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.4+c6a8ea890c
fabric-climbable-api-v1: Fabric Climbable API (v1) 1.0.0+6ffe71e20c
fabric-command-api-v1: Fabric Command API (v1) 1.0.2+2aebb7ff0c
fabric-commands-v0: Fabric Commands (v0) 0.2.0+2e0c4ff50c
fabric-containers-v0: Fabric Containers (v0) 0.1.3+b7f9825d0c
fabric-content-registries-v0: Fabric Content Registries (v0) 0.1.3+b7f9825d0c
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+b7f9825d0c
fabric-dimensions-v1: fabric-dimensions-v1 0.3.0+2ad156310c
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.0+ec432e190c
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.0+2f23104b0c
fabric-item-api-v1: Fabric Item API (v1) 1.1.0+ec432e190c
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.0+0121bd900c
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.1+06ca07090c
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.0+2af3af910c
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.2.0+f79427860c
fabric-loot-tables-v1: Fabric Loot Tables (v1) 0.1.5+e08a73050c
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.2+ec951ea40c
fabric-models-v0: Fabric Models (v0) 0.1.0+dfdb52d60c
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.3+e08a73050c
fabric-networking-v0: Fabric Networking (v0) 0.1.10+d487f0ee0c
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.3.1+b125eefd0c
fabric-object-builders-v0: Fabric Object Builders (v0) 0.6.0+de158c7e0c
fabric-particles-v1: fabric-particles-v1 0.2.1+b2771bde0c
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.2.6+f3d8141b0c
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.2.10+f08b61330c
fabric-renderer-indigo: Fabric Renderer - Indigo 0.3.4+c2e942c60c
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 2.1.0+cad0185e0c
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.3+b7f9825d0c
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.6+12515ed90c
fabric-rendering-v0: Fabric Rendering (v0) 1.1.0+534104900c
fabric-rendering-v1: Fabric Rendering (v1) 1.2.0+1778029e0c
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.1.10+06c939b30c
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 0.1.3+abd915800c
fabric-textures-v0: Fabric Textures (v0) 1.0.4+821cdba70c
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.2+db9ee7ac0c
fabricloader: Fabric Loader 0.10.5+build.213
mcvmcomputers: VM Computers 1.4.12
minecraft: Minecraft 1.15.1
Launched Version: MultiMC5
Backend library: LWJGL version 3.2.2 build 10
Backend API: GeForce GTX 1660/PCIe/SSE2 GL version 4.6.0 NVIDIA 456.71, NVIDIA Corporation
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
CPU: 4x Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz

Duplicate of #117

I see that you are on Minecraft 1.15.1. The mod requires Minecraft 1.15.2. Can you try to use the mod with Minecraft 1.15.2?

Same issue:

Crash Log:

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [HUG]

Time: 10/31/20 11:45 PM
Description: Rendering screen

java.lang.IllegalArgumentException: Color parameter outside of expected range: Alpha
at java.awt.Color.testColorValueRange(Unknown Source)
at java.awt.Color.(Unknown Source)
at java.awt.Color.(Unknown Source)
at mcvmcomputers.client.gui.GuiPCEditing.renderBackgroundAndMobo(GuiPCEditing.java:73)
at mcvmcomputers.client.gui.GuiPCEditing.render(GuiPCEditing.java:233)
at net.minecraft.class_757.method_3192(class_757.java:604)
at net.minecraft.class_310.method_1523(class_310.java:989)
at net.minecraft.class_310.method_1514(class_310.java:619)
at net.minecraft.client.main.Main.main(Main.java:204)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:141)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)

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

-- Head --
Thread: Render thread
Stacktrace:
at java.awt.Color.testColorValueRange(Unknown Source)
at java.awt.Color.(Unknown Source)
at java.awt.Color.(Unknown Source)
at mcvmcomputers.client.gui.GuiPCEditing.renderBackgroundAndMobo(GuiPCEditing.java:73)
at mcvmcomputers.client.gui.GuiPCEditing.render(GuiPCEditing.java:233)

-- Screen render details --
Details:
Screen name: mcvmcomputers.client.gui.GuiPCEditing
Mouse location: Scaled: (240, 135). Absolute: (960.000000, 540.000000)
Screen size: Scaled: (480, 270). Absolute: (1920, 1080). Scale factor of 4.000000

-- Affected level --
Details:
All players: 1 total; [class_746['TrekkerMine'/33, l='MpServer', x=-22.37, y=62.00, z=6.47]]
Chunk stats: Client Chunk Cache: 841, 487
Level dimension: minecraft:overworld
Level name: MpServer
Level seed: -7533689228064939491
Level generator: ID 05 - buffet, ver 0. Features enabled: false
Level generator options: {}
Level spawn location: World: (-16,40,22), Chunk: (at 0,2,6 in -1,1; contains blocks -16,0,16 to -1,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 18285 game time, 28974 day time
Known server brands:
Level was modded: false
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
Server brand: fabric
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.class_638.method_8538(class_638.java:450)
at net.minecraft.class_310.method_1587(class_310.java:1921)
at net.minecraft.class_310.method_1514(class_310.java:634)
at net.minecraft.client.main.Main.main(Main.java:204)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:141)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)

-- System Details --
Details:
Minecraft Version: 1.15.2
Minecraft Version ID: 1.15.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_231, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1107077496 bytes (1055 MB) / 2343043072 bytes (2234 MB) up to 4660396032 bytes (4444 MB)
CPUs: 4
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms1000m -Xmx5000m
Fabric Mods:
fabric: Fabric API 0.23.0+build.328-1.15
fabric-api-base: Fabric API Base 0.1.2+b7f9825d0c
fabric-biomes-v1: Fabric Biomes (v1) 0.1.5+3b05f68e0c
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.4+c6a8ea890c
fabric-climbable-api-v1: Fabric Climbable API (v1) 1.0.0+6ffe71e20c
fabric-command-api-v1: Fabric Command API (v1) 1.0.2+2aebb7ff0c
fabric-commands-v0: Fabric Commands (v0) 0.2.0+2e0c4ff50c
fabric-containers-v0: Fabric Containers (v0) 0.1.3+b7f9825d0c
fabric-content-registries-v0: Fabric Content Registries (v0) 0.1.3+b7f9825d0c
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+b7f9825d0c
fabric-dimensions-v1: fabric-dimensions-v1 0.3.0+2ad156310c
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.0+ec432e190c
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.0+2f23104b0c
fabric-item-api-v1: Fabric Item API (v1) 1.1.0+ec432e190c
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.0+0121bd900c
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.1+06ca07090c
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.0+2af3af910c
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.2.0+f79427860c
fabric-loot-tables-v1: Fabric Loot Tables (v1) 0.1.5+e08a73050c
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.2+ec951ea40c
fabric-models-v0: Fabric Models (v0) 0.1.0+dfdb52d60c
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.3+e08a73050c
fabric-networking-v0: Fabric Networking (v0) 0.1.10+d487f0ee0c
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.3.1+b125eefd0c
fabric-object-builders-v0: Fabric Object Builders (v0) 0.6.0+de158c7e0c
fabric-particles-v1: fabric-particles-v1 0.2.1+b2771bde0c
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.2.6+f3d8141b0c
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.2.10+f08b61330c
fabric-renderer-indigo: Fabric Renderer - Indigo 0.3.4+c2e942c60c
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 2.1.0+cad0185e0c
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.3+b7f9825d0c
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.6+12515ed90c
fabric-rendering-v0: Fabric Rendering (v0) 1.1.0+534104900c
fabric-rendering-v1: Fabric Rendering (v1) 1.2.0+1778029e0c
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.1.10+06c939b30c
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 0.1.3+abd915800c
fabric-textures-v0: Fabric Textures (v0) 1.0.4+821cdba70c
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.2+db9ee7ac0c
fabricloader: Fabric Loader 0.10.6+build.214
mcvmcomputers: VM Computers 1.4.12
minecraft: Minecraft 1.15.2
Launched Version: MultiMC5
Backend library: LWJGL version 3.2.2 build 10
Backend API: GeForce GTX 1660/PCIe/SSE2 GL version 4.6.0 NVIDIA 456.71, NVIDIA Corporation
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
CPU: 4x Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz