Cumulus Support

Hi,

Very new to this Application and Website (CumulusMX MultiLing)
My graphs on the gauges don't popup (just show an empty box)

If I goto the URL directly: http://10.1.11.1/mxui/graphPress.php I get the following error:
Fatal error: Uncaught TypeError: Argument 1 passed to JpGraphException::defaultHandler() must be an instance of Exception, instance of Error given in /var/www/html/mxui/jpgraph/jpgraph_errhandler.inc.php:158 Stack trace: #0 [internal function]: JpGraphException::defaultHandler(Object(Error)) #1 {main} thrown in /var/www/html/mxui/jpgraph/jpgraph_errhandler.inc.php on line 158

Any ideas? Running latest versions of Cumulus MX and the Website 2.2.1a
Website running PHP 7.2

Fixed ... My docker image for php and apache didn't have the php GD software
So created my own docker image with php7.3 and Apache with the required plug-ins also meant I could add the modrewrite in apache too