I've got a fresh install of the Drupal 8 Beta 12. I'm trying to install the REST UI module:

$ drush dl restui-8.x-1.x-dev

PHP Fatal error:  Class 'Drupal\Core\Session\AccountInterface' not found in /var/www/html/drup/core/includes/bootstrap.inc on line 64
Drush command terminated abnormally due to an unrecoverable error.   [error]
Error: Class 'Drupal\Core\Session\AccountInterface' not found in
/var/www/html/drup/core/includes/bootstrap.inc, line 64

Does anyone know what's going on here?

  • Tried $ drush dl restui-8.x-1.x-dev on a beta12 site just now and it worked immediately. First thing to do would be to try with a fresh new D8 site (beta12 or HEAD) and see if it works there. Then, if it doesn't, try and update Drush dev ($ sudo composer update will pull the latest dev version) and run this command again.
    – anavarre
    Jul 6, 2015 at 14:38
  • I just stumbled upon this when I tried to set up linux VM. Getting the same error with latest drupal.
    – user21641
    Aug 14, 2015 at 14:14
  • I'm getting this error with any drush command. Any resolution?
    – Rooster242
    Aug 21, 2015 at 18:00

1 Answer 1


Drush 6 does not support Drupal 8 and you need to upgrade to drush 7 (well I just upgraded to drush 8):

Drush Version   :  8.0-dev

See duplicate issue: Running Drush returns an error

Edit: If you are working on Drupal 8 you need the Drupal Console its syntax is a bit long-winded, but it is incredibly powerful.

  • 1
    The link to the tip is broken. Jul 9, 2018 at 11:55

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