[Q] Need Help with a Root Issue (Oneplus One) topic

Okay, so I flashed the latest CM12 onto my already rooted device. And now, it doesn't boot up. It's not bricked cause it does start in SAFE MODE, but i need help fixing this. Is it maybe because i didn't install Google Apps? And did i have to do that?
And now I'm really blank on what to do. The phone is always at the booting up scree. I does go into TWRP though.