Fatal error: Uncaught Error: Call to a member function format() on null in /home/www/sieml/wp-content/plugins/the-events-calendar/src/views/v2/month/calendar-body/day/calendar-events/calendar-event/tooltip/date.php:23 Stack trace: #0 {main} thrown in /home/www/sieml/wp-content/plugins/the-events-calendar/src/views/v2/month/calendar-body/day/calendar-events/calendar-event/tooltip/date.php on line 23