Page not found (error 404)

The page http://tue.altervista.org/category/progetti/?doing_wp_cron=1586219073.9871520996093750000000 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