I am facing the same issue. error: Build input file cannot be found: '/Users/ask/PT/STRICTLYWORK/X_IOS/app-ios/app-ios-xyz/build/Release-iphoneos/OneSignalNotificationServiceExtension.appex/OneSignalNotificationServiceExtension'. Did you forget to declare this file as an output of a script phase or custom build rule which produces it? (in target 'OneSignalNotificationServiceExtension' from project 'XYZ') Has anyone figured out the solution? I am using cocoapods, xcode 14.1