When I try to make a blank map, it doesn't work at all for me. I used the method provided by the Minecraft wiki, and it doesn't work. Everything else seemed to work fine for me, but this one just doesn't want to work. I quit to title and that didn't change anything and I also exited the whole game, to which that too did not work.

I'm including a screenshot of the problem. It never gives me the map. It's just a blank spot.