Steps to replicate the issue (include links if applicable):
- Begin uploading some images to Commons
- Include at least one with a nonexistent category
- Click publish
What happens?:
As the images are publishing, a notice appears at the bottom saying something like "There is at least one error with the submissions above. We recommend correcting it before continuing."
What should have happened instead?:
This notice should not have appeared, since by the time the user clicks "Publish" the images are already being published, so it is too late to take action on any warning.