Cannot access admin page to switch theme

Hi all,

I access to my admin panel for my blog http://code4projects.altervista.org.
But when I click on Appearance I cannot select submenu and access to the page to customize theme.
I already disabled all plugins but no luck.

Can anyone help?

Did you try with another browser? (or cleaning the cache)
If the problem persists, can you repair from here?

Bye!