Hello, @Demir,
1. I have checked your site now and the demo is already installed on your site. See the image for better reference: https://postimg.cc/302pN7Qd
2. I have edited your home page with Elementor and the changes are working fine and no issue found. I made a video for you on your site Please watch it complete for better reference: https://www.veed.io/view/2488dc6f-7712-4582-9888-728ab050ec1c?sharingWidget=true Regards 8Themes Team.
