I am getting this too – intermittent, if I go into the event showing the error and press save, it seem to “reset” and it is ok again.
Fatal error: Uncaught Exception: Error in formating DateTime object. Expected DateTime, but instead given boolean in /nas/content/live/surfgolfclub/wp-content/plugins/event-organiser/includes/event-organiser-utility-functions.php:31 Stack trace: #0 /nas/content/live/surfgolfclub/wp-content/plugins/event-organiser/includes/event-organiser-utility-functions.php(164): eo_format_datetime(false, 'F j, Y g:i a') #1 /nas/content/live/surfgolfclub/wp-content/themes/stm-surfgolfbeach/event-meta-event-single.php(61): eo_format_event_occurrence() #2 /nas/content/live/surfgolfclub/wp-includes/template.php(785): require('/nas/content/li...') #3 /nas/content/live/surfgolfclub/wp-content/plugins/event-organiser/includes/event-organiser-templates.php(96): load_template('/nas/content/li...', false) #4 /nas/content/live/surfgolfclub/wp-content/plugins/event-organiser/includes/event-organiser-templates.php(41): eo_locate_template(Array, true, false) #5 /nas/content/live/surfgolfclub/wp-content/themes/stm-surfgolfbeach/single-event.php(46): in /nas/content/live/surfgolfclub/wp-content/plugins/event-organiser/includes/event-organiser-utility-functions.php on line 31
Yes. WordPress 6.1
And occurs with both PHP7.4 and when upgraded to PHP8
Event Organsier version 3.12.1
WordPress 6.1. Event Organiser has only been tested up to Event Organiser Event Organiser
jQuery Version 3.6.1
PHP Version 7.4.30
MySQL Version 5.7.39-42-log
Web Server Apache