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

I uploaded a binary and still I cannot choose it.

When I clicked on Prerelease I could see that the binary is listed and when I pointed to the ? it says

After builds are uploaded they will go through a processing status before they can be used.

So I guess Apple has introduced a new step into the process, and we must wait for it to complete.