Hello,
Thank you for contacting us. I understand your concern and can assure you we’re going to do our best to help you.
Kindly perform the below troubleshooting steps, and feel free to skip what you already tried:
To rule out the possibility of a plugin or theme conflict, please deactivate all your plugins (besides Elementor & Elementor Pro) and see if it helps. If it solves the issue reactivate them one by one to find the culprit. If it didn’t help, switch your theme (temporarily) and see if it makes any difference.
Please also regenerate the CSS via Elementor > Tools > Regenerate CSS on your WordPress Dashboard, then make sure that you clear:
your WP cache (your WP plugin if you have one),
your server cache (if you have one. In this case, you can contact your hosting provider),
and your browser cache.
For reference: https://docs.elementor.com/article/184-cant-edit-with-elementor
Regards,
Said