I'm having the same problem. iOS only app. Has been uploading fine with Transporter for over a year, and now it's not allowing to upload. I don't use Xcode so i don't have any alternatice. I've reached out to Apple support, but have not heard back yet.

Ok, i've confirmed this is a new problem introduced in Transporter 1.3 (1380). I was able to upload the same .ipa via fastlane with no problems. Still crickets from Apple support. The developper program is a joke.

Yes, this is where I first turned off the visibility of the container. However I can't get back into the dashboard now because it thinks there are no container defined.

Ok bug filed FB16874756 and work around worked. Thanks!