I can not import diza theme all data (sample Data) in my website

I read the DIZA Theme documentation to import sample data from my website, but the data is not imported. please give a solution for how to import the sample data and also I can not install the same plugin on my website I can share an image of it also.

and also I can prefer a youtube step by step then also I can not import sample data.
I can that link also.

Please update the latest version of the theme and try again.