I am trying to port a RevenueCat v3 project to v4 but these messages appear during compilation:
/Users/ham/Desktop/Development/Mac/Libraries/revenuecat/Build/iOS/RevenueCat.framework/Headers/RevenueCat-Swift.h
/Users/ham/Desktop/Development/Mac/Libraries/revenuecat/Build/iOS/RevenueCat.framework/Headers/RevenueCat-Swift.h:4308:63: error build: Cannot find protocol declaration for 'SKPaymentQueueDelegate'
/Users/ham/Desktop/Development/Mac/Libraries/revenuecat/Build/iOS/RevenueCat.framework/Headers/RevenueCat-Swift.h:4365:62: error build: Cannot find protocol declaration for 'SKProductsRequestDelegate'
/Users/ham/Desktop/Development/Mac/Libraries/revenuecat/Build/iOS/RevenueCat.framework/Headers/RevenueCat-Swift.h:5748:41: error build: No type or protocol named 'SKPaymentTransactionObserver'
/Users/ham/Desktop/Development/Mac/Libraries/revenuecat/Build/iOS/RevenueCat.framework/Headers/RevenueCat-Swift.h:5758:60: error build: Cannot find protocol declaration for 'SKPaymentQueueDelegate'
/Users/ham/Desktop/Development/Mac/Libraries/revenuecat/Build/iOS/RevenueCat.framework/Headers/RevenueCat-Swift.h:5777:66: error build: Cannot find protocol declaration for 'SKRequestDelegate'
I suspect that this has something to do with Swift?
