Hello,
The issue with the Elementor login is related to FB login but we can’t test FB login because you did not set the Valid OAuth redirect URI http://prntscr.com/uv8dvo Please, check the docs and add the Valid OAuth redirect URI https://xstore.helpscoutdocs.com/article/87-facebook-login and reply back. Or add our user web.8theme to your FB dev account to allow us to fill the redirect.
Regards