Slideshow Renderer

I don't know what the project is totally supposed to do but I tried this but got this error


Don't try to export the project with a rendered slide, it won't work since I loaded images from external APIs. You should use the blocks like this:
render slide (slide with title: [Hello] and content: [World] :: grey)::grey

That's exactly what I tried

If you want to download the project use this download link.