Minecraft CurseForge

I immediately crash when trying to launch the modpack.

The Launcher closes and opens right away with that crash report.

I think its an error on my end but i cannot figure out what is causing it.

please help, thanks!

[19:36:18] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker[19:36:18] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker[19:36:18] [main/ERROR]: Unable to launchjava.lang.ClassNotFoundException: cpw.mods.fml.common.launcher.FMLTweaker at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_161] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_161] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[?:1.8.0_161] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_161] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106) ~[launchwrapper-1.12.jar:?] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_161] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_161] at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161] at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_161] at net.minecraft.launchwrapper.Launch.launch(Launch.java:98) [launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0