Fatal error: Uncaught Error: Class 'Theme' not found in /opt/lampp/htdocs/portal/jpgraph-1.27.1/jpgraph/src/themes1/VividTheme.class.php:7 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/portal/jpgraph-1.27.1/jpgraph/src/themes1/VividTheme.class.php on line 7