Thank you all for the answers. I tried to change the browser, if I use Safari I have no problem. I will do this …
Thank you
Alessandro
Hello, thank you … but no!
I have this: https://www.alefailla.com/wp-content/uploads/2018/05/Schermata-2018-05-16-alle-17.21.20.png
Maybe it’s another plugin that gives problems and I’m trying to understand deactivated one at a time …
Ok, the problem was another plug-in installed. Thank you