Note that this can happen with plugins related to Elementor that have not been updated. I’m seeing this issue coming from “ACF Post Object Elementor List Widget” but it is not limited to that plugin.
Does anyone have any ideas on this? The workaround doesn’t really work consistently and, regardless, is temporary causing the problem to return. That results in a site outage which prevents updating Elementor.
Adding an update that I was able to use a workaround posted in other plugin’s support forums.
– Go to Elementor – Tools – Regenerate CSS & Data (press button to regenerate) – MAKE SURE YOU click “Save Changes”