Fatal error: Uncaught Error: Call to undefined function wp_is_development_mode() in /customers/8/c/f/goedgemutst.be/httpd.www/wp-includes/global-styles-and-settings.php:394 Stack trace: #0 /customers/8/c/f/goedgemutst.be/httpd.www/wp-includes/theme-templates.php(214): wp_theme_has_theme_json() #1 /customers/8/c/f/goedgemutst.be/httpd.www/wp-includes/class-wp-hook.php(310): wp_enable_block_templates('') #2 /customers/8/c/f/goedgemutst.be/httpd.www/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array) #3 /customers/8/c/f/goedgemutst.be/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /customers/8/c/f/goedgemutst.be/httpd.www/wp-settings.php(555): do_action('setup_theme') #5 /customers/8/c/f/goedgemutst.be/httpd.www/wp-config.php(91): require_once('/customers/8/c/...') #6 /customers/8/c/f/goedgemutst.be/httpd.www/wp-load.php(50): require_once('/customers/8/c/...') #7 /customers/8/c/f/goedgemutst.be/httpd.www/wp-blog-header.php(13): require_once('/customers/8/c/...') #8 /customers/8/c/f/goedgemutst.be/httpd.www/index.php(17): require('/customers/8/c/...') #9 {main} thrown in /customers/8/c/f/goedgemutst.be/httpd.www/wp-includes/global-styles-and-settings.php on line 394