As Owner of a Realms I Can't be an Operator

When I created my realms, i didn't notice that even if I am the owner of the realms, the same realms did not recognizes me as an operator. I notice this problem when i had to do admin and trivial stuff, like show the coordinate on the screen, then i realice that i'm not a Operator in my Own realm, and that force me to Activate Cheat. That compromiced the world and all the players experience on the world. With the cheat activate i tried to make me an operator but didn't work, i even try to make someone else an operator but that didn't work too. What i can do with this issue?