I hope you are well today and thank you for your question.
Could you please tell me exactly what issue you are facing with login/registration on your website?
Also please try temporarily using the Twenty Twenty One theme on your site and check whether the login/registration functionality works fine on your website.
I am getting a “Suspected bot.” error as shown in the attached screenshot.
This can be due to plugin conflict on your site so please try temporarily deactivating all plugins except Redux framework, Elementor, and WpBakery page builder plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.
If it is not a plugin conflict then please contact your web host to know why this is happening.