Hi @sunny454,
I also have a WP Engine hosted site using PHP 7.2 and was encountering 502 errors like other users in this thread had experienced, even after updating all-in-one-event-calendar to version 2.5.36.
In troubleshooting with their support we found that the issue was related to the WordPress core version I was on; I had updated to WordPress 5.0.2, and they tried changing the site to WordPress 4.9.9 instead and that immediately fixed things.
Would you have any insight into why 5.0.2 might be causing issues in conjunction with PHP 7.2?
