iOS Question Upload to iStoreConnect wants "Build"

[tsteward]

Trying to upload my first iOS app.
Used hosted builder to compile, download zip, upload app to Appstore connect - no issues here was successful

In appstoreconnect I have selected Add for review and it complains "You Must Choose A Build"

How do I do this?

 

[Alexander Stolte]

How do I do this?

scroll down to "Builds" and choose a build. But first, upload a build.