Export from Illustrator to Canva

Hello everyone, 

i created a graphic in Adobe Illustrator. 

Then I saved it as an SVG file and uploaded it to Canva so that my client can change the color herself. 

BUT it seems not possible to change the color of the whole graphic. When I am in Canva, i can only change the color of the small black point (see picture). 

I exported other graphics as well and I can just change the color in Canva but apparently not with this one.

Does anyone have an idea how to solve this?

Thank you in advance 🙂