The Buttons to allow me to change Player Permissions in my world/realm no longer appears, i do not know why but it has not shown up next to the player names on the pause menu like it should..

other members of the realm say that it shows up for them, but i am the Owner and it does not show up for me

SOMEONE HELP!!!!!!!!! I CANT CHANGE PERMISSIONS OF MY REALM MEMBERS !!!!! IT ONLY LETS ME OP OR DE-OP THEM