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The page http://sarahjayderosa.altervista.org/blog/page/3/?doing_wp_cron=1571174362.7408759593963623046875 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