Can't remove shower drain
I have a 2016 36CKTS and I can't remove the shower drain. The chrome cover came off easy enough, but the black plastic insert under it just spins in place. How do I remove the plastic insert? I wanted to install a hair catcher so I can bathe my dogs and not clog up the grey tank. Now I have to get it out so I can replace the plumbers putty that's come loose.
I did try removing the linin closet in the bedroom trying to access the bottom of the shower, but the slide blocks me from pulling it out of the wall.