Design a product for 3d printing

hi i have design a product that i would like to be 3d printed, i sent the file as an stl but he showed me a picture and says its corrupt and will not work and help would be great for where i have gone wrong with my model. thanks in advance

pokemon viewer.skp (679.9 KB)

the version i am sharing is skp.

would it just be the card thats also in the image? as i dont want to keep sending the person files if they are not correct.

this is now resolved random image was issue