Example: If you drag and drop say 20 images, when you are only allowed to upload 5, you will receive the upload error 15 freaking times before I can move on. lol Is there anyway for it to be a singe error?
Just a suggestion as depending on the amount of images uploaded vs allowed, this error could get annoying. Just a heads up.
Realistically, there isn't a way to change this easily. Each file is uploaded independently (and simultaneously), so the error tracking is done separately. The output doesn't know about each other (and whether the error is a type that should be doubled up or the conditions of when to apply this).