This is my latest.log |

[20Jan2024 13:07:24.388] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, KibbzL, --version, 1.16.5-forge-36.2.34, --gameDir, C:\Users\ehvin\AppData\Roaming\.minecraft, --assetsDir, C:\Users\ehvin\AppData\Roaming\.minecraft\assets, --assetIndex, 1.16, --uuid, ca121d6c76bc41f2929c2c27a0657e5e, --accessToken, ????????, --userType, msa, --versionType, release, --launchTarget, fmlclient, --fml.forgeVersion, 36.2.34, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20210115.111550]
[20Jan2024 13:07:24.391] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.1.3+8.1.3+main-8.1.x.c94d18ec starting: java version 1.8.0_51 by Oracle Corporation
[20Jan2024 13:07:24.403] [main/WARN] [cpw.mods.modlauncher.SecureJarHandler/]: LEGACY JDK DETECTED, SECURED JAR HANDLING DISABLED
[20Jan2024 13:07:25.173] [main/INFO] [gg.essential.loader.stage1.EssentialLoaderBase/]: Starting Essential Loader (stage2) version 1.4.1 (979b6dc72ce3cae7ad825312d2151e96) [stable]
[20Jan2024 13:07:25.383] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[20Jan2024 13:07:25.409] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.4 Source=file:/C:/Users/ehvin/AppData/Roaming/.minecraft/libraries/org/spongepowered/mixin/0.8.4/mixin-0.8.4.jar Service=ModLauncher Env=CLIENT
[20Jan2024 13:07:26.955] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlclient' with arguments [--version, 1.16.5-forge-36.2.34, --gameDir, C:\Users\ehvin\AppData\Roaming\.minecraft, --assetsDir, C:\Users\ehvin\AppData\Roaming\.minecraft\assets, --uuid, ca121d6c76bc41f2929c2c27a0657e5e, --username, KibbzL, --assetIndex, 1.16, --accessToken, ????????, --userType, msa, --versionType, release]
[20Jan2024 13:07:31.021] [main/INFO] [com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService/]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[20Jan2024 13:07:31.275] [main/INFO] [net.minecraft.client.Minecraft/]: Setting user: KibbzL
[20Jan2024 13:07:31.410] [main/INFO] [net.minecraft.client.Minecraft/]: Backend library: LWJGL version 3.2.2 build 10
[20Jan2024 13:07:32.150] [main/FATAL] [net.minecraftforge.fml.ModLoader/CORE]: Error during pre-loading phase
net.minecraftforge.fml.ModLoadingException: fml.modloading.dupedmod
    at net.minecraftforge.fml.ModLoadingException.lambda$fromEarlyException$0(ModLoadingException.java:64) ~[?:?]
    at net.minecraftforge.fml.ModLoadingException$$Lambda$2949/657628458.apply(Unknown Source) ~[?:?]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_51]
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374) ~[?:1.8.0_51]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512) ~[?:1.8.0_51]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502) ~[?:1.8.0_51]
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:1.8.0_51]
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:1.8.0_51]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_51]
    at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) ~[?:1.8.0_51]
    at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270) ~[?:1.8.0_51]
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374) ~[?:1.8.0_51]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512) ~[?:1.8.0_51]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502) ~[?:1.8.0_51]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_51]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_51]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[?:1.8.0_51]
    at net.minecraftforge.fml.ModLoader.<init>(ModLoader.java:120) ~[?:?]
    at net.minecraftforge.fml.ModLoader.get(ModLoader.java:154) [?:?]
    at net.minecraftforge.fml.client.ClientModLoader.lambda$begin$1(ClientModLoader.java:103) [?:?]
    at net.minecraftforge.fml.client.ClientModLoader$$Lambda$2946/1015709240.run(Unknown Source) [?:?]
    at net.minecraftforge.fml.client.ClientModLoader.lambda$createRunnableWithCatch$4(ClientModLoader.java:123) [?:?]
    at net.minecraftforge.fml.client.ClientModLoader$$Lambda$2947/327853004.run(Unknown Source) [?:?]
    at net.minecraftforge.fml.client.ClientModLoader.begin(ClientModLoader.java:103) [?:?]
    at net.minecraft.client.Minecraft.<init>(Minecraft.java:437) [?:?]
    at net.minecraft.client.main.Main.main(Main.java:149) [?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51]
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.16.5-36.2.34.jar:36.2]
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$458/634210724.call(Unknown Source) [forge-1.16.5-36.2.34.jar:36.2]
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.1.3.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.1.3.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.1.3.jar:?]
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.1.3.jar:?]
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.1.3.jar:?]
[20Jan2024 13:07:32.194] [main/WARN] [net.minecraft.client.GameSettings/]: Removed resource pack mod_resources from options because it doesn't seem to exist anymore
[20Jan2024 13:07:32.196] [main/WARN] [net.minecraft.client.GameSettings/]: Removed resource pack quark:emote_resources from options because it doesn't seem to exist anymore
[20Jan2024 13:07:32.196] [main/WARN] [net.minecraft.client.GameSettings/]: Removed resource pack packmenu from options because it doesn't seem to exist anymore
[20Jan2024 13:07:32.196] [main/WARN] [net.minecraft.client.GameSettings/]: Removed resource pack file/ThePixelmonOST.zip from options because it doesn't seem to exist anymore
[20Jan2024 13:07:32.196] [main/WARN] [net.minecraft.client.GameSettings/]: Removed resource pack file/KehaanModPackPaintingsRP_1.16.5_v1.0.1.zip from options because it doesn't seem to exist anymore
[20Jan2024 13:07:32.196] [main/WARN] [net.minecraft.client.GameSettings/]: Removed resource pack file/ChecklistPokehaan_RP_1.16.5_v1.0.0.zip from options because it doesn't seem to exist anymore
[20Jan2024 13:07:32.196] [main/WARN] [net.minecraft.client.GameSettings/]: Removed resource pack file/HQMPokehaan2_RP_1.16.5_v1.0.0.zip from options because it doesn't seem to exist anymore
[20Jan2024 13:07:32.264] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.sound.SoundLoadEvent to a broken mod state
[20Jan2024 13:07:32.397] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.ColorHandlerEvent$Block to a broken mod state
[20Jan2024 13:07:32.400] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.ColorHandlerEvent$Item to a broken mod state
[20Jan2024 13:07:33.043] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.ParticleFactoryRegisterEvent to a broken mod state
[20Jan2024 13:07:33.070] [main/INFO] [com.mojang.text2speech.NarratorWindows/]: Narrator library for x64 successfully loaded
[20Jan2024 13:07:33.128] [main/INFO] [net.minecraft.resources.SimpleReloadableResourceManager/]: Reloading ResourceManager: Default, PokehaanCraft_RP_1.16.5_v1.0.3.zip
[20Jan2024 13:07:33.210] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.ModelRegistryEvent to a broken mod state
[20Jan2024 13:07:33.243] [Worker-Main-13/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:33.243] [Worker-Main-12/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:33.243] [Worker-Main-14/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.544] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.732] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.734] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.741] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.748] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.751] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.755] [Worker-Main-9/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Pre to a broken mod state
[20Jan2024 13:07:35.873] [main/INFO] [net.minecraft.client.audio.SoundSystem/]: OpenAL initialized.
[20Jan2024 13:07:35.874] [main/INFO] [net.minecraft.client.audio.SoundEngine/SOUNDS]: Sound engine started
[20Jan2024 13:07:36.087] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 1024x512x4 minecraft:textures/atlas/blocks.png-atlas
[20Jan2024 13:07:36.142] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.143] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x128x4 minecraft:textures/atlas/signs.png-atlas
[20Jan2024 13:07:36.143] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.143] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x512x4 minecraft:textures/atlas/banner_patterns.png-atlas
[20Jan2024 13:07:36.144] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.144] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x512x4 minecraft:textures/atlas/shield_patterns.png-atlas
[20Jan2024 13:07:36.146] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.146] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x256x4 minecraft:textures/atlas/chest.png-atlas
[20Jan2024 13:07:36.146] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.146] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x256x4 minecraft:textures/atlas/beds.png-atlas
[20Jan2024 13:07:36.147] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.147] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x256x4 minecraft:textures/atlas/shulker_boxes.png-atlas
[20Jan2024 13:07:36.147] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.446] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.ModelBakeEvent to a broken mod state
[20Jan2024 13:07:36.648] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x256x0 minecraft:textures/atlas/particles.png-atlas
[20Jan2024 13:07:36.650] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.651] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x256x0 minecraft:textures/atlas/paintings.png-atlas
[20Jan2024 13:07:36.652] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.652] [main/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 128x128x0 minecraft:textures/atlas/mob_effects.png-atlas
[20Jan2024 13:07:36.652] [main/ERROR] [net.minecraftforge.fml.ModLoader/]: Cowardly refusing to send event net.minecraftforge.client.event.TextureStitchEvent$Post to a broken mod state
[20Jan2024 13:07:36.704] [main/INFO] [STDOUT/]: [net.minecraft.crash.CrashReport:func_85057_a:196]: Negative index in crash report handler (23/26)
[20Jan2024 13:07:36.707] [main/FATAL] [net.minecraftforge.fml.client.ClientModLoader/]: Crash report saved to C:\Users\ehvin\AppData\Roaming\.minecraft\crash-reports\crash-2024-01-20_13.07.36-fml.txt

Add a screenshot of your mods-folder

7 minutes ago, TileEntity said:

Add a screenshot of your mods-folder

Here you go 

 https://imgur.com/YEipb5Y

 

Edited January 20, 20241 yr by Minerafter
Fix

Just figured it out- had duplicate thermal_foundation