11:47:37 Create new PHPExcel object<br />11:47:37 Set document properties<br />11:47:37 Generate an image<br /><br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function imagecreatetruecolor() in /var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Examples/25inmemoryimage.php:57
Stack trace:
#0 {main}
  thrown in <b>/var/www/tsf-audio-bitrate/html/vendor/phpoffice/phpexcel/Examples/25inmemoryimage.php</b> on line <b>57</b><br />