The first thing that happened to me was the freezing issue while rendering.
I unistalled all adobe programs and reinstalling over and over... Then, I decided to reset completely my iMac. I erased the hard drive and install everything back. I asumed that it was the necessary thing to do Adobe to work...
But now, with all the programs reinstalled is still failing... Now the error says: After Effects Warning: Unknown Exception.
And I don´t want to go to my terminal to fix anything because my computer is like brand new since I´ve reseted it completely.