The Block Player page
actually does work … just not very well.
While the Block button doesn’t work, if you hit the “Go” keyboard button (Mobile) after typing the players name in it will add them to block list. My guess (as I’m not on a PC at the moment) is if you hit the “Enter” key it will add the player to block list.
Perhaps I should be more specific.
The Block Players page does not work when accessing it from a PC.
I tried to block a few players a couple of days ago from the page using a PC. They were not added to the list. I used Enter initially and then I went to the player's profile and used the button. Neither one worked.
In fact, this is what I get if I click the Block Challenges button on the player's profile (PC):
It might work perfectly if it's done with a mobile device or through the PC game client. I have not tried either one, but I will do so the next time.