When importing demo content for a theme, sometimes your server may time out and give you a 500 Internal Server Error or something similar. This is generally because your host has your PHP memory limit set very low, so you will need to increase the values. This is fairly easy to do, but you do need to have access to your site’s files via either an FTP client or from your hosting cPanel.
The .htaccess file is located in your root directory, and it’s typically hidden by most FTP clients. Make sure you have “show hidden files” turned on for whatever FTP client you’re using.
Make a back-up copy of the file, then add this to the one on your server:
# BEGIN Increase Max Upload Size php_value memory_limit 256M # END Increase Max Upload Size
Please see this off-site article for other methods of increasing your PHP limit. If you don’t feel comfortable doing any of these, or if you’ve done them and they don’t work for you, please contact your host.