(Continuing from title) and failing to upload on the organizer.
I wanted to make an ipa file for publishing on TestFlight, but Xcode gives me an error saying:
I built by going to Product > Archive. I'm new to this, and I've been creating profiles, Bundle IDs and Certificates for this app. If you know a successful way of uploading a build on TestFlight or creating a .ipa file, please say so.