if you can please assist me how my site will look like as demo ?
Error: slider_export.txt does not exist! any solution please
First, I recommend running through these Standard Troubleshooting Steps if you haven't already - Standard Troubleshooting Steps.
From there, I need some additional information, specifically steps to replicate so I can test the process that you are doing. If you are following the exact steps in the documentation, then please provide these and the slider.zip that you are using.
File a Support Request
Beyond that, after you have provided confirmation that you have run through those STS and steps to replicate, I'm happy to take a quick look to see I can import the slider. You will need to provide temporary credentials and confirmation that you have backed up your site, as this reaches beyond the scope of support.
Support Policy | Articles | Standard Troubleshooting Steps | File a Support Request