20:47:10 Create new PHPExcel object<br />20:47:10 Set document properties<br />20:47:10 Generate an image<br /><br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function imagecreatetruecolor() in /var/www/html/01/hk1/vendor/phpoffice/phpexcel/Examples/25inmemoryimage.php:57
Stack trace:
#0 {main}
  thrown in <b>/var/www/html/01/hk1/vendor/phpoffice/phpexcel/Examples/25inmemoryimage.php</b> on line <b>57</b><br />