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I am running Drush version 6.2.0 and the latest Drupal 8 beta on Dreamhosters. When I run drush cc all within the sites directory, I receive the following error immediately after executing the command:

Fatal error: Class 'Drupal\Core\Session\AccountInterface' not found in /home/mywebsite/mywebsite.com/core/includes/bootstrap.inc on line 63 Drush command terminated abnormally due to an unrecoverable error.

Error: Class 'Drupal\Core\Session\AccountInterface' not found in /home/mywebsite/mywebsite.com/core/includes/bootstrap.inc, line 63

Why does it happen? How can I fix this?

4 Answers 4

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Drush 6 does not support Drupal 8. You must use drush 7.0-rc1 with Drupal 8 beta 9, or drush master head with Drupal 8 head.

UPDATE: Drush 7 no longer supports Drupal 8; now, use Drush 8 with Drupal 8.

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If you are using Drush 8 with Drupal 8 and still getting this error... Please make sure path is correct. For me it worked after setting path variable as:-

export PATH="$HOME/.composer/vendor/bin:$PATH"
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  • Thanks! I had landed in this post with a similar problem (when using drush site-install with a local Drush 8 to install Drupal 8) and setting the path to composer/vendor/bin worked fine.
    – dinopmi
    Dec 18, 2015 at 14:37
  • Awesome! After a Drush reinstall, this turned out to be a much simpler fix. Oct 27, 2016 at 18:44
  • vote up, work for me too
    – Yuseferi
    Nov 12, 2016 at 22:41
  • Where do I add this code ? Feb 8, 2017 at 7:59
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As for Drupal 8, drush cc all is no longer the way to clear cache, use drush cr instead:

`cache-clear all` is deprecated for Drupal 8 and later. Please use the `cache-rebuild` command instead.                                                                  [error]
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I ran into the same error using Drush 5.10.0 from a previous Drupal 7 project. If you have composer installed globally you can upgrade Drush to the latest version using:

$ composer global require drush/drush:dev-master

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