After processing today’s plugin updates for Events Tickets 4.5, Plus, and Calendar Events I immediately received the following warning:
Warning: Declaration of Tribe__Tickets__RSVP::get_attendees(WP_Query $attendees_query, $post_id) should be compatible with Tribe__Tickets__Tickets::get_attendees($attendees_query, $post_id) in /homepages/36/d687218338/htdocs/clickandbuilds/GoldenWaveTours/wp-content/plugins/event-tickets/src/Tribe/RSVP.php on line 3
I deactivated all other plugins and changed the theme to twenty seventeen and the issue persisted. I had kept the “events tickets,” “events tickets plus” and “the events calendar” all activated. I then one-by-one deactivated the three plugins and found that the issue was only resolved when both “events tickets” and “events tickets plus” are deactivated.