Error Removing Categories

[Guest]

 

I try to delete PrestaShop's native Categories, but I can't. I go to Catalog> Categories> and try to delete the selected Category as shown in the figure.

 

However, when I go to the Delete button, nothing happens.

 

Could I delete the category by the database? If so, how do I do it?

Note: I've tried removing it in all three options, but nothing happens. Also, I already created my own category to try to eliminate, but nothing happens again.

Sorry for my english, I'm brazilian.

[Rhobur]

Set the Debug mode to On in Advanced Preferences -> Performance, it'll display useful info for debugging.