Hello,
Recently, I encountered some issues in the basel theme, for which I removed some plugins.
Please make sure you have not removed theme related plugins, navigate to Appearance > Install plugins and install activate all.
I am not able to export the product details
Our theme does not have functionality or influence on exporting products
most importantly, the navigation I created in the desktop mode is not visible in the mobile view
Please provide admin access to your site so that we could check.
Best Regards