Fatal error: Uncaught Error: Using $this when not in object context in /var/www/andovercg/staging/wp-content/plugins/forminator/admin/views/common/list/chart_script.php:12 Stack trace: #0 {main} thrown in /var/www/andovercg/staging/wp-content/plugins/forminator/admin/views/common/list/chart_script.php on line 12