Fatal error: Uncaught Error: Class "PHPExcel_Writer_HTML" not found in /home/bitrix/www/contest-pps/phpExcel_8/Classes/PHPExcel/Writer/PDF/Core.php:28 Stack trace: #0 {main} thrown in /home/bitrix/www/contest-pps/phpExcel_8/Classes/PHPExcel/Writer/PDF/Core.php on line 28