Fatal error: Uncaught Error: Class "PHPExcel_CachedObjectStorage_CacheBase" not found in C:\xampp\htdocs\crop_db\libs\phpoffice\PHPExcel\CachedObjectStorage\PHPTemp.php:36 Stack trace: #0 {main} thrown in C:\xampp\htdocs\crop_db\libs\phpoffice\PHPExcel\CachedObjectStorage\PHPTemp.php on line 36