Fatal error: Uncaught Error: Class 'ImgData' not found in E:\xampp\htdocs\teacher2\m\inc\class\jpgraph\imgdata_pushpins.inc.php:11 Stack trace: #0 {main} thrown in E:\xampp\htdocs\teacher2\m\inc\class\jpgraph\imgdata_pushpins.inc.php on line 11