Fatal error: Uncaught Error: Class 'Theme' not found in E:\xampp\htdocs\teacher2\m\inc\class\jpgraph\themes\UniversalTheme.class.php:6 Stack trace: #0 {main} thrown in E:\xampp\htdocs\teacher2\m\inc\class\jpgraph\themes\UniversalTheme.class.php on line 6