Psychological Practice Theme "load demo data" misses images

I used these instructions…

B.1. How to install demo data?

After theme & plugins installation, please go to “Appearance” -> “Martanian Theme Options” page. Click on “Load demo data” tab at the top of this page, and you’ll see the demo data loader tool:


Most of the theme not included preview images instead they used placeholder. So, I think in this theme the theme Author not included preview images. So, you can edit and add your own images. If you need any support from theme Author please Contact Author and let them know.