Using this theme on Nextcloud Pico CMS

[elhananjair]

Hello there, I loved the theme and wanted to use it on Nextcloud, I have downloaded and extracted ethereal folder in the specified path, and I could able to chose ethereal as a theme form setting, now I when I go to the link to the website, I don't see that beautiful photo slide instead its some basic page. So please can you guide me on how do I really got that great look and update to my needs, thanks for the great job.