Redirect still works

looks fine to me, see this: https://goo.gl/lHG6J7 maybe clear your browser cache. see this: https://www.refreshyourcache.com/en/home/

Not in home page or other in admin page, try to catch http error in this link: https://www.lacapanninadifranceschi.com/wp-admin

The plugin does not run on the admin side. Must be something else cause that

the plugin was deleted by me, but the problem remain the same

The plugin does not run on the admin or do a redirect. So it must be something. Especially if you delete it. There is no way for a plugin to run if you delete it.

ok, thanks you