Fatal error: Uncaught Error: Interface "PHPExcel_RichText_ITextElement" not found in C:\Apache24\htdocs\Erp_Evaluaciones\PHPExcel-1.8\Classes\PHPExcel\RichText\TextElement.php:26 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\Erp_Evaluaciones\PHPExcel-1.8\Classes\PHPExcel\RichText\TextElement.php on line 26