Fatal error: Uncaught ValueError: imagecreatetruecolor(): Argument #1 ($width) must be greater than 0 in /var/www/gallery/index.php:169 Stack trace: #0 /var/www/gallery/index.php(169): imagecreatetruecolor() #1 /var/www/gallery/index.php(100): createThumbnail() #2 /var/www/gallery/index.php(29): list_files() #3 {main} thrown in /var/www/gallery/index.php on line 169