Sometimes making mandalas difficult. Especially if you don't know about clone techniques in inkscape.
I personally prefer “Objects” than using “Layers”. Objects can be opened via the “Objects> Objects” menu.
Make sure all your designs, both path and object. Please be included in the design-area group, and start by clicking live-click. Use Objects to manage objects.
The author has created an inkscape (.svg) template to make it easier to use. Please right-click link below then Save link As to download.
Hopefully the template that I made is useful for you all. ^^