Don′t find edit button for permalinks

Hi
I have a website https://www.gattiasoc.com.ar
But I can′t personalize the permanents url.
The entries don′t have the “edit” button.
When I try to modify at adjust > permanent links
I can′t modify to other option.
Please see the pictures with my comments at this links
https://gattiasoc.com.ar/wp-content/uploads/2017/03/image1.jpg
https://gattiasoc.com.ar/wp-content/uploads/2017/03/image2.jpg