Fatal error: Uncaught Error: Class 'PHPExcel_Settings' not found in D:\code\xmt2\core\ThinkPHP\Library\Vendor\PHPExcel\Writer\PDF\tcPDF.php:30 Stack trace: #0 {main} thrown in D:\code\xmt2\core\ThinkPHP\Library\Vendor\PHPExcel\Writer\PDF\tcPDF.php on line 30