Modpack launch errors - Unable to find what is causing the problem

[BoomiCat]

Hiya, upon running my modpack, Minecraft opens and goes through some processes until crashing a few seconds afterwards.

I have the crash log from the Technic Launcher and I cannot make any sense out of it.

Here is the log: (I also attached a .txt version of it in case of easier readability)

Spoiler

[B#617] Analytics Response [runModpack]: 200
[B#617] Starting download of https://cdn.technicpack.net/platform2/pack-icons/1823507.png?1615227338, with 3 tries remaining
[B#617]  [18:17:49.030] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, fmlclient, --fml.forgeVersion, 31.2.49, --fml.mcVersion, 1.15.2, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20200515.085601, --username, BoomiCat, --version, 1.15.2-forge-31.2.49, --gameDir, C:\Users\Charlie\AppData\Roaming\.technic\modpacks\world-of-snow, --assetsDir, C:\Users\Charlie\AppData\Roaming\.technic\assets, --assetIndex, 1.15, --uuid, b4de1286fbcb4ac3b7342a2364b9e558, --accessToken, ????????, --userType, mojang, --versionType, release, --title, World of Snow, --icon, C:\Users\Charlie\AppData\Roaming\.technic\assets\packs\world-of-snow\icon.png]
[B#617]  [18:17:49.034] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher 5.1.2+70+master.2845bb9 starting: java version 1.8.0_281 by Oracle Corporation
[B#617]  [18:17:49.257] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.onLoad
[B#617]  [18:17:49.261] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFine ZIP file: C:\Users\Charlie\AppData\Roaming\.technic\modpacks\world-of-snow\mods\OptiFine_1.16.5_HD_U_G7_MOD.jar
[B#617]  [18:17:49.263] [main/INFO] [optifine.OptiFineTransformer/]: Target.PRE_CLASS is not available
[B#617]  [18:17:49.928] [main/INFO] [loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[B#617]  [18:17:49.971] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/Users/Charlie/AppData/Roaming/.technic/cache/org/spongepowered/mixin/0.8.2/mixin-0.8.2.jar Service=ModLauncher Env=CLIENT
[B#617]  [18:17:49.979] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.initialize
[B#617]  [18:17:51.203] [main/ERROR] [loading.LanguageLoadingProvider/]: Missing language javafml version [35,) wanted by antiqueatlas-5.4.4-forge.jar, found 31.2
[B#617]  [18:17:52.054] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.transformers
[B#617]  [18:17:52.088] [main/INFO] [optifine.OptiFineTransformer/]: Targets: 308
[B#617]  [18:17:54.167] [main/INFO] [optifine.OptiFineTransformationService/]: additionalClassesLocator: [optifine., net.optifine.]
[B#617]  [18:17:54.234] [main/ERROR] [mixin/]: Mixin config antiqueatlas.mixins.json does not specify "minVersion" property
[B#617]  [18:17:54.336] [main/INFO] [LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlclient' with arguments [--version, 1.15.2-forge-31.2.49, --gameDir, C:\Users\Charlie\AppData\Roaming\.technic\modpacks\world-of-snow, --assetsDir, C:\Users\Charlie\AppData\Roaming\.technic\assets, --uuid, b4de1286fbcb4ac3b7342a2364b9e558, --username, BoomiCat, --assetIndex, 1.15, --accessToken, ????????, --userType, mojang, --versionType, release, --title, World of Snow, --icon, C:\Users\Charlie\AppData\Roaming\.technic\assets\packs\world-of-snow\icon.png]
[B#617]  [18:17:55.115] [main/FATAL] [TransformerClassWriter/]: Class net/minecraft/client/renderer/WorldRenderer$ShaderException unable to find resource null
[B#617]  [18:17:55.121] [main/WARN] [mixin/]: Error loading class: net/minecraft/client/renderer/WorldRenderer (java.lang.RuntimeException: Failed to load hierarchy member net/minecraft/client/renderer/WorldRenderer$ShaderException)
[B#617]  [18:17:55.121] [main/WARN] [mixin/]: @Mixin target net.minecraft.client.renderer.WorldRenderer was not found firstpersonmod.forge.mixins.json:WorldRendererMixin
[B#617]  [18:17:57.090] [main/WARN] [mixin/]: Error loading class: net/minecraft/world/gen/feature/template/Template$Palette (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.090] [main/WARN] [mixin/]: @Mixin target net.minecraft.world.gen.feature.template.Template$Palette was not found immersiveengineering.mixins.json:accessors.PaletteAccess
[B#617]  [18:17:57.108] [main/WARN] [mixin/]: Error loading class: net/minecraft/world/gen/feature/jigsaw/LegacySingleJigsawPiece (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.108] [main/WARN] [mixin/]: @Mixin target net.minecraft.world.gen.feature.jigsaw.LegacySingleJigsawPiece was not found immersiveengineering.mixins.json:accessors.SingleJigsawAccess
[B#617]  [18:17:57.122] [main/WARN] [mixin/]: Error loading class: net/minecraft/block/AbstractBlock$AbstractBlockState (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.122] [main/WARN] [mixin/]: @Mixin target net.minecraft.block.AbstractBlock$AbstractBlockState was not found immersiveengineering.mixins.json:coremods.AbstractBlockStateMixin
[B#617]  [18:17:57.260] [main/WARN] [mixin/]: Error loading class: net/minecraft/client/renderer/GPUWarning (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.265] [main/WARN] [mixin/]: @Mixin target net.minecraft.client.renderer.GPUWarning was not found immersiveengineering.mixins.json:accessors.client.GPUWarningAccess
[B#617]  [18:17:57.328] [main/FATAL] [TransformerClassWriter/]: Class net/minecraft/client/renderer/WorldRenderer$ShaderException unable to find resource null
[B#617]  [18:17:57.330] [main/WARN] [mixin/]: Error loading class: net/minecraft/client/renderer/WorldRenderer (java.lang.RuntimeException: Failed to load hierarchy member net/minecraft/client/renderer/WorldRenderer$ShaderException)
[B#617]  [18:17:57.330] [main/WARN] [mixin/]: @Mixin target net.minecraft.client.renderer.WorldRenderer was not found immersiveengineering.mixins.json:accessors.client.WorldRendererAccess
[B#617]  [18:17:57.340] [main/FATAL] [TransformerClassWriter/]: Class net/minecraft/client/renderer/WorldRenderer$ShaderException unable to find resource null
[B#617]  [18:17:57.341] [main/WARN] [mixin/]: Error loading class: net/minecraft/client/renderer/WorldRenderer (java.lang.RuntimeException: Failed to load hierarchy member net/minecraft/client/renderer/WorldRenderer$ShaderException)
[B#617]  [18:17:57.341] [main/WARN] [mixin/]: @Mixin target net.minecraft.client.renderer.WorldRenderer was not found immersiveengineering.mixins.json:coremods.client.WorldRendererMixin
[B#617]  [18:17:57.351] [main/WARN] [mixin/]: Error loading class: net/minecraft/world/biome/BiomeAmbience (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.352] [main/WARN] [mixin/]: @Mixin target net.minecraft.world.biome.BiomeAmbience was not found primalwinter.mixins.json:world.biome.BiomeAmbienceAccessor
[B#617]  [18:17:57.373] [main/FATAL] [TransformerClassWriter/]: Class net/minecraft/client/renderer/WorldRenderer$ShaderException unable to find resource null
[B#617]  [18:17:57.373] [main/WARN] [mixin/]: Error loading class: net/minecraft/client/renderer/WorldRenderer (java.lang.RuntimeException: Failed to load hierarchy member net/minecraft/client/renderer/WorldRenderer$ShaderException)
[B#617]  [18:17:57.373] [main/WARN] [mixin/]: @Mixin target net.minecraft.client.renderer.WorldRenderer was not found primalwinter.mixins.json:client.renderer.WorldRendererMixin
[B#617]  [18:17:57.447] [main/WARN] [mixin/]: Error loading class: net/minecraft/world/gen/feature/template/Template$Palette (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.450] [main/WARN] [mixin/]: Error loading class: net/minecraft/tags/ITag$INamedTag (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.453] [main/WARN] [mixin/]: Error loading class: net/minecraft/tags/ITag$INamedTag (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.454] [main/WARN] [mixin/]: Error loading class: net/minecraft/block/AbstractBlock$Properties (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.456] [main/WARN] [mixin/]: Error loading class: net/minecraft/tags/ITag$INamedTag (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.457] [main/WARN] [mixin/]: Error loading class: net/minecraft/world/biome/BiomeGenerationSettings$Builder (java.lang.ClassNotFoundException: null)
[B#617]  [18:17:57.584] [main/INFO] [STDOUT/]: [net.minecraft.client.main.Main:main:79]: Completely ignored arguments: [--title, World of Snow, --icon, C:\Users\Charlie\AppData\Roaming\.technic\assets\packs\world-of-snow\icon.png]
[B#617]  [18:17:58.233] [main/FATAL] [TransformerClassWriter/]: Class net/minecraft/block/AbstractBlock$AbstractBlockState unable to find resource null
[B#617]  Exception in thread "main" [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:39)
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at cpw.mods.modlauncher.Launcher.run(Launcher.java:81)
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at io.github.zekerzhayard.forgewrapper.installer.Main.main(Main.java:50)
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: Caused by: java.lang.reflect.InvocationTargetException
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[B#617]  [18:17:58.234] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at java.lang.reflect.Method.invoke(Unknown Source)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]:     ... 5 more
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]: Caused by: java.lang.ExceptionInInitializerError
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at net.minecraft.crash.CrashReport.func_71504_g(CrashReport.java:101)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at net.minecraft.crash.CrashReport.<init>(CrashReport.java:54)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at net.minecraft.crash.CrashReport.func_230188_h_(CrashReport.java:425)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at net.minecraft.client.main.Main.main(SourceFile:129)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     ... 11 more
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]: Caused by: java.lang.RuntimeException: Failed to load hierarchy member net/minecraft/block/AbstractBlock$AbstractBlockState
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:86)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformerClassWriter.access$100(TransformerClassWriter.java:35)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformerClassWriter$SuperCollectingVisitor.visit(TransformerClassWriter.java:129)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at org.objectweb.asm.tree.ClassNode.accept(ClassNode.java:340)
[B#617]  [18:17:58.235] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:74)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformerClassWriter.<init>(TransformerClassWriter.java:48)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:247)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:134)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:96)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at java.lang.ClassLoader.loadClass(Unknown Source)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     at net.optifine.reflect.Reflector.<clinit>(Reflector.java:236)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:-1]:     ... 15 more
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printEnclosedStackTrace:-1]: Caused by: java.io.IOException: Class not found
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printEnclosedStackTrace:-1]:     at org.objectweb.asm.ClassReader.readStream(ClassReader.java:310)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printEnclosedStackTrace:-1]:     at org.objectweb.asm.ClassReader.<init>(ClassReader.java:283)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printEnclosedStackTrace:-1]:     at cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:82)
[B#617]  [18:17:58.236] [main/INFO] [STDERR/]: [java.lang.Throwable:printEnclosedStackTrace:-1]:     ... 26 more

Any help is appreciated

crash log.txt

[JaariAtmc]

Forge for 1.15.2, Optifine for 1.16.5. I'll let you figure out the rest.

[BoomiCat]

6 hours ago, JaariAtmc said:

Forge for 1.15.2, Optifine for 1.16.5. I'll let you figure out the rest.

Excuse my rookie mistakes

I've had a lot of errors with my modpack and I'm just learning the way of getting around errors such as these. I forgot that I didn't change the forge version once I updated my mods.

Thanks for your help anyway!