Nothing in the error logs unfortunately. There were a couple notices that I resolved due to having defined a constant after the wp-settings.php in the wp-config.
At the beginning, I left W3 Total cache enabled and wouldn’t get any other errors, but after disabling W3 Total cache, I would get the notices & warning when updating a recurring event. It doesn’t appear to be anything major though.
I also checked for any white spaces in the PHP that might cause the “Cannot modify header” warning.
I went ahead and selected all of the recurring events and changed them all to “draft” and then back to “published” to see if any of them might have been stuck, but no luck there.
Notice: Undefined index: event_attributes in /usr/local/www/site.com/wp-content/plugins/events-manager/classes/em-event.php on line 2007
Warning: Cannot modify header information - headers already sent by (output started at /usr/local/www/site.com/wp-content/plugins/events-manager/classes/em-event.php:2007) in /usr/local/www/site.com/wp-admin/post.php on line 237
Warning: Cannot modify header information - headers already sent by (output started at /usr/local/www/site.com/wp-content/plugins/events-manager/classes/em-event.php:2007) in /usr/local/www/site.com/wp-includes/pluggable.php on line 1196
Thanks again!