Character Animator won't launch

Hello there,

my Character Aniamtor app just wont start. When I open it, it shows the splash screen and says "loading skybox...." plugin but it will never finish.

I already tried reinstalling and searched the forums but I don't know what to do.

Here are my system specs:

Win10 with latest Updates

i7 6900k

64gig Ram

Nvidia GTX1080

Asus Board

One 4k Monitor and two 1680x1050 Monitors

What can I do about this?