Dungeon Architect

Quick Start Content Pack problem

Could you help me with quick start content pack for Dungeon Architect plugin.
I’ve download quick start content from website, made a new third person project in 4.6.1 for it and copied all files in content folder.
is a link for screenshot

I’ve tried to open example maps, but it is empty at all:
https://ibb.co/nojzQv
Dungeon theme is empty too:
https://ibb.co/hjiFyF
Same problems with all demos.

Could you help me to solve this problem?
Thank you in advance.