You don’t have permission to access /…/smartslider/…/ on this server
– You don’t have permission to access /…/smartslider/…/ on this server
– 403 forbidden screen
This error message could happen, if there is some wrong server setting. One problem could be if the .htaccess file is misconfigured, what you can check if you rename this file in your root folder, and see, if the error still happens. If it does, then you should contact your server host, they have an error log, and they should be able to help you resolve this problem.