Sorry, I'm a neofita of web site building.
when I go from my website altervista.org to the photo gallery appears the name of my gallery "viaggiando"
If a guest click on this topic appear a grey page, if click on the thumbnail, open a second gallery (the true one with same name "viaggiando") with all the downloaded pictures.
so how can I delete the first empty directory?

thanks for the help

Probably an issue with this old third party them your are using. Note you are also using an outdated Zenphoto version we don't support anymore.