Fatal error: Uncaught Error: Using $this when not in object context in /home/rednewt/public_html/wp-content/plugins/events-calendar-pro/src/views/blocks/additional-fields/checkbox.php:15 Stack trace: #0 {main} thrown in /home/rednewt/public_html/wp-content/plugins/events-calendar-pro/src/views/blocks/additional-fields/checkbox.php on line 15