Warning: require_once(/var/www/html/PrestaShop-8.1.5/config/../vendor/autoload.php): Failed to open stream: No such file or directory in /var/www/html/PrestaShop-8.1.5/config/autoload.php on line 30

Fatal error: Uncaught Error: Failed opening required '/var/www/html/PrestaShop-8.1.5/config/../vendor/autoload.php' (include_path='.:/usr/share/php') in /var/www/html/PrestaShop-8.1.5/config/autoload.php:30 Stack trace: #0 /var/www/html/PrestaShop-8.1.5/config/config.inc.php(36): require_once() #1 /var/www/html/PrestaShop-8.1.5/index.php(27): require('...') #2 {main} thrown in /var/www/html/PrestaShop-8.1.5/config/autoload.php on line 30