Fatal error: Uncaught Error: Class 'Mantum_Model' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Mantum\View\Grafico\DataGrafico\Serie.php:11 Stack trace: #0 {main} thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Mantum\View\Grafico\DataGrafico\Serie.php on line 11