Description of my issue:
Hello. I have a very strange problem, never happened before.
J3.4.8 site, start upgrading to j3.6.
At some stage of the Akeeba backup, which is regularly concludes, however, it does not update the version of Joomla.
This is the page that appears at the end:
not Found
The requested URL/administrator/http%3A%2F%2Fwww.impresaalba.it%2Fadministrator%2Findex.php%3Foption%3Dcom_joomlaupdate%26task%3Dupdate.install%26is_backed_up%3D1 was not found on this server.
Grazie!!!