When I attempt to use Drush 8.0.3 on a clean Drupal 8.1.1 install, I receive the following error:
Command pm-list needs a higher bootstrap level to run - you will need to invoke drush from a more functional Drupal environment to run this command.
This is on a Digital Ocean server running Ubuntu and nginx.
Drush status:
root@*********:/var/www/html/drupal/sites/default# drush status
Drupal version : 8.1.1
Site URI : http://default
Database driver : mysql
Database hostname : localhost
Database port :
Database username : drupal
Database name : drupal
PHP configuration : /etc/php5/cli/php.ini
PHP OS : Linux
Drush script : /usr/local/bin/drush
Drush version : 8.0.3
Drush temp directory : /tmp
Drush configuration :
Drush alias files :
Drupal root : /var/www/html/drupal
Drupal Settings File : sites/default/settings.php
Site path : sites/default
Sync config path : sites/default/files/config_JYMyTTYRsOD-Wxu0fI7lfugHI6rk2DbhO5g-jrfjsPyy46mmesB1aTpSuq2RAUIOUC4N2q_IkQ/sync
Oddly (to me, at least) I can clear caches:
root@***************:/var/www/html/drupal/sites/default# drush cr
Cache rebuild complete.