Fatal error: Uncaught Error: Non-static method shop\categories::getTree() cannot be called statically in /var/www/ecom/www/app/seller/pages/text.php:14 Stack trace: #0 /var/www/ecom/www/classes/router.class.php(186): include() #1 /var/www/ecom/www/app/seller/index.php(71): router->runPage() #2 {main} thrown in /var/www/ecom/www/app/seller/pages/text.php on line 14