Warning: require_once(../../vendor/autoload.php): Failed to open stream: No such file or directory in /var/www/html/vendor/mike42/gfx-php/test/io/read.php on line 3

Fatal error: Uncaught Error: Failed opening required '../../vendor/autoload.php' (include_path='.:/usr/share/php') in /var/www/html/vendor/mike42/gfx-php/test/io/read.php:3 Stack trace: #0 {main} thrown in /var/www/html/vendor/mike42/gfx-php/test/io/read.php on line 3