Fatal error: Uncaught Error: Call to undefined function Org_Heigl\Ghostscript\exec() in /home/khademni/public_html/vendor/org_heigl/ghostscript/src/Ghostscript.php:271 Stack trace: #0 /home/khademni/public_html/vendor/org_heigl/ghostscript/src/Ghostscript.php(913): Org_Heigl\Ghostscript\Ghostscript::setGsPath() #1 {main} thrown in /home/khademni/public_html/vendor/org_heigl/ghostscript/src/Ghostscript.php on line 271