Error: Class "PDDMTheme\App\Walkers\NavWalker" not found in /var/www/deb-test/public/content/themes/publica/header.php:60 Stack trace: #0 /var/www/deb-test/public/pddm/wp-includes/template.php(810): require_once() #1 /var/www/deb-test/public/pddm/wp-includes/template.php(745): load_template() #2 /var/www/deb-test/public/pddm/wp-includes/general-template.php(48): locate_template() #3 /var/www/deb-test/public/content/themes/publica/template-with-sidenav.php(6): get_header() #4 /var/www/deb-test/public/pddm/wp-includes/template-loader.php(106): include('...') #5 /var/www/deb-test/public/pddm/wp-blog-header.php(19): require_once('...') #6 /var/www/deb-test/public/index.php(14): require('...') #7 {main}