TestFlight rejected with "ITMS-90426: Invalid Swift Support" after upgrade to expo 41

this may be a bit of a pain, but can you try deleting xcode and re-installing it? or try submitting with eas submit (but still building with expo build)

my best guess is that something is wrong with the local xcode installation on your machines. xcode is pretty opaque so “something” is the best i can do here

another question for you - are you using app signing credentials that are automatically generated and managed by expo or providing your own?

Thanks @notbrent. My machine was still on Catalina, but after the iOS 14.5 upgrade Xcode 12.5 is required–and that’s only supported in Big Sur. So I upgraded to Big Sur and installed Xcode 12.5. The problem unfortunately still persists :frowning:

As for the signing credentials: I had let Expo create them originally and explicitly got Expo to (re-)create a new iOS Distribution certificate and Provisioning Profile. That did not help either.

  • i cloned your app from the private repo you shared, switched to the expo41 branch, ran yarn, changed the bundleIdentifier in app.json and the name, then built it using expo build:ios.
  • i tried submitting it through Transporter but had some weird error about the bundle id (this) so i just went ahead and used eas submit -p ios --url path-to-binary-produced-by-expo-build
  • eas submit worked successfully:

this is further evidence that the issue seems to somehow be related to the environment. i’d encourage you to sign up for the free one month of eas priority in order to try using eas submit, so you can verify for yourself that it does indeed seem related to the environment. as we can see above, where transporter was inexplicably failing for me, it’s certainly not usual for this to happen.

@notbrent thank you for trying to reproduce the problem. I just tried the following: rm -r node-modules, npm install, expo build:ios, and then submitted with eas submit. No difference, I still get the error :frowning:
What parts and components are built locally and what parts are built in the Expo cloud? I’m trying to understand what could be different/broken in my local setup.

the only thing built locally is your javascript bundle that we embed in the prebuilt app binary later on our servers. i think this has to be a bug on apple’s side. maybe apple support could lend more guidance on how to proceed