Page not found (error 404)

The page http://lucacarbone.altervista.org/logo-shield/?doing_wp_cron=1537498082.2483570575714111328125 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