Drush не работает после обновления ядра

Всем привет! После обновления до 7.63 не работает Drush.
Выдает ошибки:

drush cron
Command core-cron needs a higher bootstrap level to run - you will   [error]
need to invoke drush from a more functional Drupal environment to run
this command.
The drush command 'cron' could not be executed.                      [error]
Drush command terminated abnormally due to an            [error]
unrecoverable error.
Error: Call to undefined function cache_get() in
/home/l/account/site.com/public_html/includes/module.inc,
line 762
Your memory limit is set to 25.599999427795M; Drush needs[error]
as much memory to run as Drupal.  Please check your
configuration settings in /etc/php5/apache2/php.ini or in
your drush.ini file; see examples/example.drush.ini for
details.

Подобные ошибки выскакивают при любой команде.
В чем может быть проблема? И как исправить? Заранее благодарен.