Lucer, I still had you PDF link so I took a chance and downloaded it.

I then created a Xara design file from the PDF by Importing into XPro+ (XDPX versions should also work).
I deleted my blank index page and renamed your first page index.
I then set up the design to be a Scrolling one with Page Previews and a PDF download link.

I had a bit of a wrestle into getting it into Xara Cloud+ but when it was saved there, I could gain a website preview link.

You portfolio is now visible in https://shared.xara.com/esC98z4iuC.

It took all of 10 minutes to develop in XPro+.
Getting Xara Cloud+ took 40 minutes to get sorted and 30 seconds to publish.

In passing, you do have an external link on Page 100 - Lucer Andrey - Design Portfolio (xara.com) - it is a 404.

Acorn