FTB Launcher isn't launching due to "MaxPermSize=128M; support was removed in 8.0"

[Krazii_Infamous]

Title:

FTB Launcher isn't launching due to "MaxPermSize=128M; support was removed in 8.0"​

Launcher Version:

1.4.7​

Modpack:

FTB​

Modpack Version:

1.5.0​

Log Link:

http://paste.feed-the-beast.com/view/057c6740​

Details of the issue:

[23:32:01] [main/ERROR]: Unable to launch
java.lang.ClassNotFoundException: cpw.mods.fml.common.launcher.FMLTweaker
at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_45]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_45]
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[?:1.8.0_45]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_45]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_45]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_45]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_45]
at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_45]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:98) [launchwrapper-1.11.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128M; support was removed in 8.0​

 

[JjStAr992_Gaming]

The "MaxPermSize=128M; support was removed in 8.0" didn't cause the crash. Try using Java 7 instead of Java 8 and see what happens. If that doesn't work, reinstall the modpack.

 

[Killersdaddy]

working now for some reason. The Modpack wasnt the Problem...didnt came so far. It stopped loading while starting the launcher not the game
But thanks a lot for your help