GTA 5 roles not working?

(Xbox One)

On the Internet you should press RB + X, but it still doesn't work.

You have to aim and press X.

You can't let go of RB

Aim and. Spacebar…

Aiming is on the trigger?!

Then it should be RT (hold) and X.

I play on Ps4 I wrote RB because he did too

Aso