I seem to be seeing a similar issue on 26.0. Installs of my app fail in both TestFlight and the App Store with error messages like: [BUYB8DC691B/app.symbolic.apps.appstore:6477066265]: Failed to set IXProgressHint on the coordinator: Error Domain=IXErrorDomain Code=5 "A coordinated app install already exists for [app.symbolic.apps.appstore/Invalid/[system-defined]] with intent IXCoordinatorIntentUpdating (creator App Store) but request by appstoreagent (pid 1012) was for intent IXCoordinatorIntentInitiating" UserInfo={NSLocalizedFailureReason=Coordinated install exists with different intent., FunctionName=-[IXSClientConnection _remote_createAppInstallCoordinatorWithSeed:createIfNotExisting:requireMatchingIntent:scopeRequirement:completion:], SourceFileLine=641, NSLocalizedDescription=A coordinated app install already exists for [app.symbolic.apps.appstore/Invalid/[system-defined]] with intent IXCoordinatorIntentUpdating (creator App Store) but request by appstoreagent (pid 1012) was for intent IXCoordinatorIntentInitiating}