I just got off with Elementor support. Here is what they had me do.
Deactivate and Uninstall Elementor Pro
Update Elementor Core to 3.7.1
Download the newest version of Elementor Pro from my account and install it.
This worked for me.
I’m getting the same issue/error. I’m hosted at WP Engine and they said that the newest version of Elementor is causing issues with other clients also. For now, I’m holding off on the Elementor updates in hopes that they will resolve it.