Hello, @nasheet997,
Thanks for the access. I have checked your issue and found that the demo is not imported successfully on your site, and causes unexpected issues on the complete site.
Now, You are using the latest version of the theme and its core plugin but also, there are a lot of third-party plugins installed and activated on your site. In order to avoid any unexpected issues and import the desired demo you want, first please reset your complete site then activate the theme and it’s necessary plugins only then try to import the demo and you will never face any issues. Importing demos multiple times on the same site will cause these kinds of issues. I hope it makes sense to you. If you want us to import the demo to your site. Please allow us to debug your site and reset it, all the existing content will be lost and the demo content will be uploaded successfully on your site after that you can start working on your site as per your need.
Regards 8Themes Team.