I ran into the same issues when iOS 14 was released. I did not want to update my app to NativeScript 7. I was able to get it running again with minor changes. I wrote a guide on my blog: timleland.com/how-to-fix-nativescript-issue-with-ios14-and-xcode-12/ Step 1 Add Podfile to app/App_Resources/iOS/ folder with this content: post_install do |installer| 		installer.pods_project.targets.each do |target| 				target.build_configurations.each do |config| 						config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET' 						config.build_settings['CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER'] = 'NO' 				end 		end 	end Step 2 Add this content to app/App_Resources/iOS/build.xcconfig file EXCLUDED_ARCHSEFFECTIVE_PLATFORM_SUFFIX_simulatorNATIVE_ARCH_64_BIT_x86_64=arm64 arm64e armv7 armv7s armv6 armv8 EXCLUDED_ARCHS=$(inherited) $(EXCLUDED_ARCHSEFFECTIVE_PLATFORM_SUFFIX_$(EFFECTIVE_PLATFORM_SUFFIX)NATIVE_ARCH_64_BIT_$(NATIVE_ARCH_64_BIT)) Step 3 Update to tns-ios 6.5.2 tns platform remove ios tns platform add ios@6.5.2 You should now be able to build and test your app. Let me know if this solves your issues.