Fatal error: Uncaught Error: Class 'SPSS\Sav\Record\Info\Unknown' not found in C:\xampp\htdocs\Egresados\vendor\tiamo\spss\src\Sav\Record\Info\DataFileAttributes.php:5 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Egresados\vendor\tiamo\spss\src\Sav\Record\Info\DataFileAttributes.php on line 5