So sorry to hear this. And this is really surprising me. Just tested the plugin on PHP8 with wordpress 6.1.1. Everything worked as expected.
For me was new that we have to use the new shortcode widget of Gutenberg to make it work (I normally do not use Gutenberg). The only thing that I can imagine is that the current screenshots are missleading here.
Anyways. Tomorrow a new version will come. And the screenshots will be replaced.
Thank you for your feedback.