Fatal error: Uncaught Error: Call to undefined function get_header() in /var/www/web527/html/blog/wp-content/themes/twentyfifteen/index.php:17
Stack trace:
#0 /var/www/web527/html/blog/wp-includes/template-loader.php(89): include()
#1 /var/www/web527/html/blog/wp-blog-header.php(16): require_once('/var/www/web527...')
#2 /var/www/web527/html/blog/index.php(17): require('/var/www/web527...')
#3 {main}
thrown in /var/www/web527/html/blog/wp-content/themes/twentyfifteen/index.php on line 17