After uploading all Wordpress files from Windows localhost to NetRegistry root folder, my template CSS file is unreadable. When I checked cPanel Error Log, this error appeared:

(13)Permission denied: /home/xxxx/public_html/wp-content/.htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable, referer: http://www.itropics.net/

Solution:

Make sure your wp-content folder permission is set to 755.