Drupal8 FieldException: Attempt to create a field storage without a field name
After a drush upgrade from 8.4.2 to 8.4.4, my site went down with "The website encountered an unexpected error. Please try again later." error, and the error log is filling up with this message:
Uncaught PHP Exception Drupal\Core\Field\FieldException: "Attempt to create a field storage without a field name." at /var/www/mysite.com/htdocs/core/modules/field/src/Entity/FieldStorageConfig.php line 246
Drush couldn't clear caches (the above error popped up). I tried everything I could think of, including: