New iTunes connect interface error “You must choose a build”

Question

When trying to submit my new app to the app store, I noticed Apple has changed its website interface: after updating metadata and keywords and hitting \"submit for review\" I go

Answer 1

You have to upload a binary for your new App. Then, you wait ~5-20 min while processing and select the plus button and select a binary and save. After that you may Submit for Review. If it takes longer than ~25 min try uploading the binary again.