Hello,
Could you explain what exactly does not work for you?
I tried to choose import of the elementary demo and did not face problem https://gyazo.com/09a450894c2a222c591af3d2979cad65
At this moment only default demo is available for import. Did you want to install any other demo? Which one?
At this moment we are working on the creation of additional demos for the Elementor.
Regards