I download WordPress theme, uncompress it, upload the files to my site, and always the same error message appears on that url: "Fatal error: Call to undefined function get_header() in /mnt/w0809/d38/s25/b02a9d41/www/mysite.com/blogs/index.php on line 1" , as it can be seen here: Blog. /www/ is where sites are hosted in my hosting account. I uploaded different WordPress themes, from their official site and from web-sites of independed WordPress themes makers, there's always the same error message.