Hi there - Lindsey here from Support. I hope you're doing well notwithstanding this issue!
Thanks so much for reaching out regarding this as I can definitely see this on the site at the moment, as well. I've notified our team of this for now, but to help us get a better idea of how best to move forward (and what could potentially be causing this), have you made any changes or optimisations recently or around the time that this error started popping up?
This might include a theme change, theme or plugin update, adding new plugins, adding new content, adjusting your settings, etc. Any information you may be able to provide would be very helpful!