Fatal error: Uncaught exception 'DOMPDF_Exception' with message 'Requested HTML document contains no data.' in /var/www/html/ComprobantesPago/clases/dompdf_old/include/frame_tree.cls.php:135 Stack trace: #0 /var/www/html/ComprobantesPago/clases/dompdf_old/include/dompdf.cls.php(293): Frame_Tree->build_tree() #1 /var/www/html/ComprobantesPago/clases/dompdf_old/include/dompdf.cls.php(377): DOMPDF->_process_html() #2 /var/www/html/ComprobantesPago/pages/comprobantes/generar_pdf.php(24): DOMPDF->render() #3 {main} thrown in /var/www/html/ComprobantesPago/clases/dompdf_old/include/frame_tree.cls.php on line 135