My PNG is too tall!!

I've created a flowchart in Adobe Illustrator with the intention of using it in a course in Rise. When I export the flowchart as a .png and put the image into Rise, though, it is very small and you can't see the words. I've tried resizing in Adobe and then reuploading to the course, but it's not making a difference. I've also tried it in frames for "Image full width" and "Carousel" with no luck. Any ideas on what I could do without rebuilding the graphic in a different way?

https://360.articulate.com/review/content/ef5c9b7f-bce5-466f-afb6-982e404ba6ca/review