Fatal error: Uncaught Error: Class "LinearScale" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/mitoteam/jpgraph/src/lib/jpgraph_log.php:19 Stack trace: #0 /var/www/html/upload/PhpSpreadsheet-master/vendor/mitoteam/jpgraph/src/lib/jpgraph_polar.php(13): require_once() #1 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/mitoteam/jpgraph/src/lib/jpgraph_log.php on line 19