Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/html/potree3D.ia-proofing.com/public/wp-includes/functions.php:3666 Stack trace: #0 /var/www/html/potree3D.ia-proofing.com/public/wp-includes/load.php(177): require_once() #1 /var/www/html/potree3D.ia-proofing.com/public/wp-settings.php(38): wp_check_php_mysql_versions() #2 /var/www/html/potree3D.ia-proofing.com/public/wp-config.php(111): require_once('...') #3 /var/www/html/potree3D.ia-proofing.com/public/wp-load.php(50): require_once('...') #4 /var/www/html/potree3D.ia-proofing.com/public/wp-blog-header.php(13): require_once('...') #5 /var/www/html/potree3D.ia-proofing.com/public/index.php(21): require('...') #6 {main} thrown in /var/www/html/potree3D.ia-proofing.com/public/wp-includes/functions.php on line 3666