Chissà. Le estensioni sono tutte aggiornate? E Joomla?
Tutto aggiornato parte Akeeba backup che mi restituisce questo errore da una ettima circa:
You are using an obsolete PHP version Your site is running on PHP 5.4.45-0+deb7u2 which has stopped receiving security updates since Giovedì, 03 Settembre 2015. Using this on a live site is
dangerous: unpatched security issues can get your site hacked. Moreover, we can only guarantee support for obsolete versions of PHP after nine months since their end-of-life date. Therefore, support for your version of PHP may be dropped any time after Venerdì, 03 Giugno 2016. We strongly advise you to ask your host to upgrade your site to PHP 5.6 or later.