Modpack error, help

[Kaduk]

My modpack I made has been crashing on launch. All the mods are for the correct version (1.15.2) and their is no problem with compatibility when i test it using forge in singleplayer. I've attached the crash log.

 

[23:39:44] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[23:39:44] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[23:39:44] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[23:39:44] [main/INFO] [FML]: Forge Mod Loader version 14.23.5.2847 for Minecraft 1.12.2 loading
[23:39:44] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_231, running on Windows 10:amd64:10.0, installed at C:\Program Files\Java\jre1.8.0_231
[23:39:44] [main/WARN] [FML]: The coremod FMLCorePlugin (net.minecraftforge.fml.relauncher.FMLCorePlugin) is not signed!
[23:39:44] [main/WARN] [FML]: The coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin) is not signed!
[23:39:44] [main/INFO] [FML]: Searching E:\Games\Technic\modpacks\dwafwafawfsf\mods for mods
[23:39:44] [main/INFO] [FML]: Loading tweaker optifine.OptiFineForgeTweaker from preview_OptiFine_1.15.2_HD_U_G1_pre9.jar
[23:39:44] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:39:44] [main/INFO] [LaunchWrapper]: Loading tweak class name optifine.OptiFineForgeTweaker
[23:39:44] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[23:39:44] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:39:44] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:39:44] [main/INFO] [LaunchWrapper]: Calling tweak class optifine.OptiFineForgeTweaker
[23:39:44] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:56]: OptiFineForgeTweaker: acceptOptions
[23:39:44] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:56]: OptiFineForgeTweaker: injectIntoClassLoader
[23:39:44] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:242]: OptiFine ClassTransformer
[23:39:44] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:242]: OptiFine ZIP file: E:\Games\Technic\modpacks\dwafwafawfsf\mods\preview_OptiFine_1.15.2_HD_U_G1_pre9.jar
[23:39:44] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[23:39:45] [main/FATAL] [FML]: Patcher expecting non-empty class data file for net.minecraft.crash.CrashReport$1, but received empty.
[23:39:45] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.RuntimeException: java.lang.RuntimeException: Patcher expecting non-empty class data file for net.minecraft.crash.CrashReport$1, but received empty, your vanilla jar may be corrupt.
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:169) ~[modpack.jar:?]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Caused by: java.lang.RuntimeException: Patcher expecting non-empty class data file for net.minecraft.crash.CrashReport$1, but received empty, your vanilla jar may be corrupt.
    at net.minecraftforge.fml.common.patcher.ClassPatchManager.applyPatch(ClassPatchManager.java:114) ~[modpack.jar:?]
    at net.minecraftforge.fml.common.patcher.ClassPatchManager.getPatchedResource(ClassPatchManager.java:77) ~[modpack.jar:?]
    at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.getFieldType(FMLDeobfuscatingRemapper.java:219) ~[modpack.jar:?]
    at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.parseField(FMLDeobfuscatingRemapper.java:192) ~[modpack.jar:?]
    at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:161) ~[modpack.jar:?]
    at net.minecraftforge.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:187) ~[modpack.jar:?]
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:164) ~[modpack.jar:?]
    ... 2 more
[23:39:45] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[23:39:45] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]:     at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[23:39:45] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]:     at java.lang.SecurityManager.checkExit(Unknown Source)
[23:39:45] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]:     at java.lang.Runtime.exit(Unknown Source)
[23:39:45] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]:     at java.lang.System.exit(Unknown Source)
[23:39:45] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]:     at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[23:39:45] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]:     at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
 

[Lord Ptolemy]

Moved to Platform Pagoda.

[JaariAtmc]

"OptiFineForgeTweaker from preview_OptiFine_1.15.2_HD_U_G1_pre9.jar" Why are you using optifine 1.15 for Forge 1.12.2? Why are you using Forge 1.12.2 for Vanilla 1.15?