presentations shortcode doesn't work

How can I use the presentations shortcode?

Hi
I am trying to create a presentation for a speech I will be holding directly on my WordPress website newsite.skulpturkunst.ch (theme: twentyfifteen), without using external content (e.g. Google docs presentation). I first tested the plugin “seoslides” which would just have met my main requirements perfectly:
– easy to create with existing media on my website
– SEO relevant for my website
– online content
But viewing the presentation didn’t work (error: “too many redirects”? No clue why…).
I then found the shortcodes feature “presentations” on https://en.support.wordpress.com/presentations/#viewing. I installed the shortcodes plugin, and followed the instructions, but the shortcode “presentation” doesn’t seem to work, it is simply not executed (it just shows the shortcodes I wrote into the page as text), neither is it shown in the list of the plugin of all available shortcodes (how come?)

How should I use the shortcodes “presentation” and “slide”?
My goals are:
– presentation for a speech (slideshow like Powerpoint, fullscreen)
– online content, use for SEO purposes to enhance my website content
– easy to edit and manage

Thanks for your support, I am quite desperate already!..

Kind regards
snilini

https://wordpress.org/plugins/shortcodes-ultimate/