Fatal error: Uncaught Error: Call to undefined function get_header() in /home/httpd/vhosts/aepplimueller.ch/httpdocs/wordpress/wp-content/themes/klasik/index.php:16
Stack trace:
#0 {main}
  thrown in /home/httpd/vhosts/aepplimueller.ch/httpdocs/wordpress/wp-content/themes/klasik/index.php on line 16