If you are referring to the Warning with the "This is not an existing title", please make sure that you tick that box and click on the "Re-Check These Updates" button.
Please try submitting the new title again through the form here. You can also find more details and frequently asked questions about submitting a new title on the FAQ page here.
Otherwise, if you are still experiencing problems, please take a screen grab of the error and post it here so our staff can take a look.