Uploaded file was not accepted.

I uploaded an image to adobe stocka and after few days I got an error that 'Unfortunately, this image doesn't meet our quality standards so we can’t accept it into our collection. Common issues that can impact the technical quality of images include exposure issues, soft focus, excessive filtering or artifacts/noise. ' the main reason of the error was quality issues.

Will someone tell me clearly that what is the reason and how to solve it?