Launcher does not start any modpack

[Levii]

Hello!

I tried a lot of things from multiple threads and I still don't know what to do... I got this Aotb Server today with friends, but I am the only one who cannot start the modpack.. actually any modpack I tried from the launcher... 

Here: http://pastebin.com/af0xndng

I hope you guys can help me... After launching a modpack, it instantly closes without even showing up  I installed the newest version of Java 8 64bit and even tried other 64bit versions... 

Thank you for your support!

[Deamonias]

i have the same problem but i can reduce the problem to one point.
all modpacks that have code chicken core do not work ... modpacks like banished or decimation work perfect.

thats the fml-client log from a pack that crashes
http://pastebin.com/6pHX98jM

[AetherPirate]

Both of you, see if this issue is affecting you