Thanks for bringing this to our attention. Do I understand correctly that bitcode is enabled for your application target in its build settings, and the error occurs when you try to perform Product → Archive build, with Debug configuration selected in the Scheme Editor for Archive action? We'll look into our options, but for the time being, unless you specifically need Reveal to work against your ad-hoc builds, I would suggest considering a different integration method as a workaround. Specifically, loading the Reveal Server via an Xcode breakpoint is a convenient alternative if you predominantly inspect your app using Reveal while it's running in the Simulator.
Just wanted to let you know that Reveal 19 shipped with a version of the Server framework that includes full bitcode support. If you can update to Reveal 19, can you confirm that it resolves the issue you've been experiencing? You can learn more about this update in our blog.