Problem on 2 parts installation

Hi all,

I’m following below document to perform 2 parts installation

Perform a two part install covered here
https://snapcreek.com/duplicator/docs/quick-start?utm_source=duplicator_free&utm_medium=wordpress_plugin&utm_content=da_size_two_part&utm_campaign=duplicator_pro#quick-060-q

But I couldn’t compress files under the website. Right-click all files, selected, and compress. It always ends up with;

Error
Unable to connect to backend.
Backend not foun

d.
HTTP error 404

I have tried zip/gzip/tbz with same result. I have been googling around a while but couldn’t find a solution.

Please help. Thanks

Regards