Fatal error: Uncaught Error: Call to undefined function wp_nonce_field() in /home/dennis91/public_html/wp-content/plugins/the-events-calendar/src/admin-views/metabox/compatibility/events-control-extension/mark-online.php:26
Stack trace:
#0 {main}
thrown in /home/dennis91/public_html/wp-content/plugins/the-events-calendar/src/admin-views/metabox/compatibility/events-control-extension/mark-online.php on line 26