I've recently re-provisioned my development box, and went to run a drush command but was met with

Unable to load autoload.php. Drush now requires Composer in order to install its dependencies and autoload classes. Please see README.md

I then tested to see if Composer was installed and found it was (version 1.0.3).

Would anyone know what I can do here?

  • How did you test to see if composer was installed? Drush doesn't think it is so maybe it's not in your path
    – Clive
    Jan 31, 2017 at 7:49
  • I just typed composer and it spat out the information.
    – MeltingDog
    Jan 31, 2017 at 22:24

1 Answer 1


There is a Drupal core isssue about this: Catch error(s) from composer install not being run and return friendly error.


Basically, you need to run composer install from inside your docroot.

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