Fatal error: Uncaught Error: Class "Core\Session" not found in /var/www/tokerate-backend/app/controllers/About.php:17 Stack trace: #0 /var/www/tokerate-backend/app/core/App.php(55): Controller\About->index() #1 /var/www/tokerate-backend/public/index.php(21): App->loadController() #2 {main} thrown in /var/www/tokerate-backend/app/controllers/About.php on line 17