Please send us your email so we can log in to our website. Can I browse the site after logging in? WordPress says max_input_vars value – max 6144 and website says max_input_vars value – min 6144. Check this out too.
Now check back your site and check the issue. I have deactivated some of your third party plugins on your site and the elementor is working fine.
Screenshot for clarification: https://ibb.co/4mr597B
Check back your site after completely clearing the browser cache and check the issue.