Warning: require(/var/www/back/app/../vendor/autoload.php): Failed to open stream: No such file or directory in /var/www/back/app/init.php on line 3

Fatal error: Uncaught Error: Failed opening required '/var/www/back/app/../vendor/autoload.php' (include_path='.:/usr/local/lib/php') in /var/www/back/app/init.php:3 Stack trace: #0 /var/www/alexandria/index.php(7): require() #1 {main} thrown in /var/www/back/app/init.php on line 3