@mt1895 Did you figure out your issue? My website is also hosted on Kinsta and I was getting the same notices (“_wp_footnotes_kses_init” not found or invalid function name). My website was also having 500 errors. I found the conflict to be between BuddyBoss and Heartbeat Control. I am waiting to see if Heartbeat Control will be updated to fix the issue. If you are running BuddyBoss and Heartbeat Control, it may be your issue. https://www.ads-software.com/support/topic/heartbeat-control-conflict-with-buddyboss-500-errors/
