Minecraft 1.7.10
Forge 10.13.2.1232

RadixCore 1.3.4
MCA 4.1.5

Crash report: http://paste.pound-python.org/show/0wAhHLOCFU7tRg3w1CLi/

I'm not sure that the same issue has already been reported here. When I Startup the Minecraft, Radix core cause this crash.
The crash report shows the description:
RADIX CORE: Unexpected exception during pre-initialization.
java.lang.NullPointerException: RADIX CORE: Unexpected exception during pre-initialization.

I'm using the original MCA, without any modification.
But the Minecraft launcher isn't the default ones.

Wow, that's a lot of mods. Are you using the default Minecraft launcher? Did you make any changes to MCA's skins, language files, etc.?