Hi I made an account just to post this sorry if I don't get the setup right.

Downloaded the pack which took along time because I kept getting different errors like certain addons not being able to download. I got lucky and was able to download it but seems I crash whenever I start it up I checked some of the other posts but nothing seemed in the ball park.

Using the newest version Version 3.1.2 Hotfix 1
Don't know how to get the crash log but was able to pull up the report so ill go ahead an copy paste the last piece where it crashed and proceeded to end the script.

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)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.RuntimeException: Patcher expecting non-empty class data file for net.minecraft.crash.CrashReport$1, but received empty, your vanilla jar may be corrupt.
at net.minecraftforge.fml.common.patcher.ClassPatchManager.applyPatch(ClassPatchManager.java:113)
at net.minecraftforge.fml.common.patcher.ClassPatchManager.getPatchedResource(ClassPatchManager.java:76)
at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.getFieldType(FMLDeobfuscatingRemapper.java:219)
at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.parseField(FMLDeobfuscatingRemapper.java:192)
at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:161)
at net.minecraftforge.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:187)
at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:164)
... 2 more
04:29:01.169
[java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
04:29:01.170
[java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
04:29:01.170
[java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
04:29:01.170
[java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Runtime.exit(Runtime.java:107)
04:29:01.170
[java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.System.exit(System.java:971)
04:29:01.171
[java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
04:29:01.171
[java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
04:29:01.236

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0

Vanilla Minecraft jar file is either cracked or corrupted.

We do not support piracy, so I will not provide any advice for the former.

For the latter, if using Twitch launcher try repairing the profile. If that fails, remove the folder Documents/Curse/Minecraft/Install/Versions/1.12.2

We use the issue tracker exclusively for bug reports and feature requests. However, this issue appears to be a support request. Please use our Discord for support. https://discord.gg/darkosto

Thank you for the help I will definitely check with the repair twitch thing. As for the crack or corrupted that concerns me because I’ve been a legitimate buyer of Minecraft for 8+ years so if something is wrong with it please let me know.