Function dont work in the downloaded app but work fine in the live test

Hi. I have made a APP in thunkable. Where I use this block to change color in some boxes with the blocks on this photo. My question is why the boxes in the downloaded app after 1 click turns white. When I click in the live test version it works perfectly fine???
I really hope someone out there have some good tips.

I hope this link to picture on facebook works.

Hoping to hear from some one.
My email is martin@funhall.dk