I am having similar issue. But can’t tell what the error is. I just get a general “Hello World” page, and not like the live preview. Please contact me ASAP.
So I also just installed this Cian WordPress theme. But am only getting the typical “Hello Wold” message. I would like to activate the demo as seen in the live preview. Is there a setting I need to change in order to see the live preview demo to work from that?