Fatal error: Uncaught Error: Class 'PHPExcel_Worksheet_CellIterator' not found in C:\isanto\web\titan_84\www\adds\visor_certificado2\libs\phpoffice\PHPExcel\Worksheet\ColumnCellIterator.php:38 Stack trace: #0 {main} thrown in C:\isanto\web\titan_84\www\adds\visor_certificado2\libs\phpoffice\PHPExcel\Worksheet\ColumnCellIterator.php on line 38