How to ROOT & Flash TWRP; Cannot flash. FAILED (remote: Command not allowed)

Hey,

I got an M4 Aqua but none of the rooting tools or guides are working for me.
I don't have xperia protect activated.

Bootloader is unlocked; using flashtool and unlockcode.
When I try to flash TWRP I get: FAILED (remote: Command not allowed) (with whatever time)

I have tried a few root programs and none are working;
TowelRoot, Z4Root, KingO-Root, OneClick Root, SuperOneClick.

Is there any guide that works and isn't a spamming website ;) (geeksomething website is just survey spam).

Thanks!!!!!!!