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