See https://github.com/mozilla/mediawiki-bugzilla/issues/104 Yes, we have created the '$wgBugzillaChartStorage' 'charts' folder w/ proper permissions for the apache2 server. However, if trying to get charts working, bar or pie, we either get the error: " Bugzilla query error Notice: Array to string conversion in /srv/www/jogamp.org/mediawiki-git-1.32/extensions/Bugzilla/templates/error.tpl on line 5 error, http-bad-status, Array" or the resulting images are corrupt / buggy. +++ Our test page: https://jogamp.org/wiki/index.php/Test01 == bar 1 == { "version": "2.4.0", "x_axis_field": "status" } == bar 2 == { "version": "2.4.0", "y_axis_field":"percent_complete", "x_axis_field": "status" } == pie 1 == { "version": "2.4.0", "x_axis_field": "status" } == pie 2 == { "version": "2.4.0", "y_axis_field":"percent_complete", "x_axis_field": "status" }