Page not found (error 404)

The page http://fuckyeahxfactor.altervista.org/category/xf/page/3/?doing_wp_cron=1550542280.1574420928955078125000 was not found on this server.

This can be due to:

Pay attetion to UPPER and LOWER cases
http://site.altervista.org/Page.html is different from http://site.altervista.org/page.html