Someone is including the 1.8.0-beta01 and the SDK I work on which doesn’t use the beta. Their app throws this error (which I can reproduce).
java.lang.NoSuchMethodError: No static method ViewRegistry([Lcom/squareup/workflow1/ui/ViewFactory;)Lcom/squareup/workflow1/ui/ViewRegistry; in class Lcom/squareup/workflow1/ui/ViewRegistryKt; or its super classes (declaration of 'com.squareup.workflow1.ui.ViewRegistryKt'