Hey @rwwest,
I checked out deploys for those sites and see that you seem to be up and running again after adding CI=false to your build command. Adding our community post on that here for others who may stumble across this:
Please let us know if you need anything else at this point!
I’ve also updated the title of this post to make it more discoverable since several of the build failures we’re seeing due to the CI change are React apps in particular.