I am receiving 404 error message after I have enabled my Drupal clean/SEF/Short URLs
This issue usually happens after enabling the “Clean URLs” option in Drupal.
To resolve it, make sure you have a .htaccess file in your Drupal root directory containing these lines:
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
More information on how to configure SEF URLs for Drupal is available in our tutorial.