Warning: require(inc/class.php): Failed to open stream: No such file or directory in /home/gsu/ftp/index.php on line 16

Fatal error: Uncaught Error: Failed opening required 'inc/class.php' (include_path='.:/usr/share/php:/usr/share/pear') in /home/gsu/ftp/index.php:16 Stack trace: #0 {main} thrown in /home/gsu/ftp/index.php on line 16