I also have the same problem:
“Update the main image to meet listing guidelines
We believe the main image has text, logo, graphic or watermark which is not permitted for this product type. Please submit a compliant image to lift the suppression. Also refer to Product image requirements.”
As @ahmad0 says, just look at the image posted. The main image on a listing has to contain just the product itself and a white background. As a second image, you can use it.
Fixed it for you. This one you can upload as the title image: