WP File Download plugin is not installed correctly

WP File Download uses its own framework which is automatically installed in the /wp-content/mu-plugins

Sometimes this directory has wrong permissions and WP File Download can't install its framework.
To fix this issue : 

  • Create the folder /wp-content/mu-plugins
  • Make sure the /wp-content/mu-plugins is writable by your webserver user
  • Go again to your wordpress administration page and check if you still have the error.

You still have the issue

  • Unzip the content of wp-file-download.zip file on your local machine
  • Create the folder /wp-content/mu-plugins on your website if it doesn't exist
  • Copy the content of the /wp-file-download/framework/ folder from the previously unzip files to the /wp-content/mu-plugins/ folder in your website server
  • Go again to your wordpress administration page, you should not have the error anymore