Fatal error: Uncaught Error: Class 'LinearScale' not found in /opt/lampp/htdocs/portal/jpgraph-1.27.1/jpgraph/src/New folder/jpgraph_log.php:20 Stack trace: #0 /opt/lampp/htdocs/portal/jpgraph-1.27.1/jpgraph/src/New folder/jpgraph_polar.php(14): require_once() #1 {main} thrown in /opt/lampp/htdocs/portal/jpgraph-1.27.1/jpgraph/src/New folder/jpgraph_log.php on line 20