Warning: Undefined variable $img in /customers/e/3/9/propellermusicdivision.com/httpd.www/gallery/image.php on line 50

Fatal error: Uncaught TypeError: imagejpeg(): Argument #1 ($image) must be of type GdImage, null given in /customers/e/3/9/propellermusicdivision.com/httpd.www/gallery/image.php:50
Stack trace:
#0 /customers/e/3/9/propellermusicdivision.com/httpd.www/gallery/image.php(50): imagejpeg(NULL)
#1 {main}
  thrown in /customers/e/3/9/propellermusicdivision.com/httpd.www/gallery/image.php on line 50